2006 Vol. 23, No. 1
Display Method:
2006, 23(1): 1-5.
doi: 10.11804/NuclPhysRev.23.01.001
Abstract:
K^±,η and Ф meson productions at subthreshold energies in pA collisions are briefly reviewed. These subthreshold meson productions can also be carried out at CSR in Lanzhou. Especially, experiments on Ф meson production near subthreshold energy in pA collisions should be performed in the future.
K^±,η and Ф meson productions at subthreshold energies in pA collisions are briefly reviewed. These subthreshold meson productions can also be carried out at CSR in Lanzhou. Especially, experiments on Ф meson production near subthreshold energy in pA collisions should be performed in the future.
2006, 23(1): 6-9.
doi: 10.11804/NuclPhysRev.23.01.006
Abstract:
Considering quark condensate contributions from the QCD vacuum, the non-perturbative effect on the K-factor is investigated for the C-C collision Drell-Yan process with and without nuclear shadowing respectively, at the center-of-mass energy √s= 630 and 200 GeV. Comparison of the results indicates that both the non-perturbative effect and the nuclear shadowing effect pose a weak influence on the K-factor.
Considering quark condensate contributions from the QCD vacuum, the non-perturbative effect on the K-factor is investigated for the C-C collision Drell-Yan process with and without nuclear shadowing respectively, at the center-of-mass energy √s= 630 and 200 GeV. Comparison of the results indicates that both the non-perturbative effect and the nuclear shadowing effect pose a weak influence on the K-factor.
2006, 23(1): 10-12.
doi: 10.11804/NuclPhysRev.23.01.010
Abstract:
In this paper I would like to discuss the strategy in obtaining analytical formulas of number of spin I states of identical particles, and the relationship between dimension and sum rules for angular momentum couplings such as six-j and nine-j symbols. I shall also discuss the J-pairing interaction, number of states with spin I and isospin T, i. e. , number of states for nucleons in a single-j shell.
In this paper I would like to discuss the strategy in obtaining analytical formulas of number of spin I states of identical particles, and the relationship between dimension and sum rules for angular momentum couplings such as six-j and nine-j symbols. I shall also discuss the J-pairing interaction, number of states with spin I and isospin T, i. e. , number of states for nucleons in a single-j shell.
2006, 23(1): 13-17.
doi: 10.11804/NuclPhysRev.23.01.013
Abstract:
The γ rays following the β^＋/EC decay of ^176. 178Ir nuclei have been investigated using in-beam γ- ray experiment. A total of 4 new levels, 13 new γ transitions of ^176Os and 5 new levels, 14 new γ transitions of ^178Os were identified. In addition, with the aid of a helium-jet recoil fast tape transport system, the β^＋/EC decay of ^176Ir was further studied, the above new γ rays were proved and an isomer was proposed in ^176Ir. By the semiempirical calculations of two-quasiparticle intrinsic states of odd-odd nuclei, the configurations of ground states and isomeric states were also proposed for ^176, 178Ir
The γ rays following the β^＋/EC decay of ^176. 178Ir nuclei have been investigated using in-beam γ- ray experiment. A total of 4 new levels, 13 new γ transitions of ^176Os and 5 new levels, 14 new γ transitions of ^178Os were identified. In addition, with the aid of a helium-jet recoil fast tape transport system, the β^＋/EC decay of ^176Ir was further studied, the above new γ rays were proved and an isomer was proposed in ^176Ir. By the semiempirical calculations of two-quasiparticle intrinsic states of odd-odd nuclei, the configurations of ground states and isomeric states were also proposed for ^176, 178Ir
2006, 23(1): 18-22.
doi: 10.11804/NuclPhysRev.23.01.018
Abstract:
The Accelerator Mass Spectrometry facility at the China Institute of Atomic Energy was established in 1989. The measurement methods for interesting nuclides such as ^36Cl, ^10Be, ^129I, ^26Al, ^79Se and ^41Ca etc. have been established and studies on their applications have been carried out. The facility and some interesting applications are briefly introduced.
The Accelerator Mass Spectrometry facility at the China Institute of Atomic Energy was established in 1989. The measurement methods for interesting nuclides such as ^36Cl, ^10Be, ^129I, ^26Al, ^79Se and ^41Ca etc. have been established and studies on their applications have been carried out. The facility and some interesting applications are briefly introduced.
2006, 23(1): 23-34.
doi: 10.11804/NuclPhysRev.23.01.023
Abstract:
The status of studying biology system therapy with X-rays, γ-rays, neutron, proton, and heavy ions is reviewed. The depth dose profile, called Bragg profile, makes heavy ion an ideal tool for radiotherapy. The physical process of therapy with heavy ions is analyzed and a 3-step interaction processes of heavy ions with biomolecules is proposed, that is, nuclear fragmentation in nuclear interaction, electron excitation in Coulomb interaction, and the biomolecules relaxation in surroundings, finally leads to a new structure of biomolecule. Since this physical process is the base of the following chemical process and biological process, a dynamical microscopic approach is strongly demanded to be built.
The status of studying biology system therapy with X-rays, γ-rays, neutron, proton, and heavy ions is reviewed. The depth dose profile, called Bragg profile, makes heavy ion an ideal tool for radiotherapy. The physical process of therapy with heavy ions is analyzed and a 3-step interaction processes of heavy ions with biomolecules is proposed, that is, nuclear fragmentation in nuclear interaction, electron excitation in Coulomb interaction, and the biomolecules relaxation in surroundings, finally leads to a new structure of biomolecule. Since this physical process is the base of the following chemical process and biological process, a dynamical microscopic approach is strongly demanded to be built.
2006, 23(1): 35-39.
doi: 10.11804/NuclPhysRev.23.01.035
Abstract:
Nanochannel technology is a new method of sequencing nucleic acid directly, originated at the end of the tast century. The essestial principle is to translate the current signal into the nucleic acid sequence information by a patch clamp equipment as it passes through the nanochannel. This method is cheaper, simpler and faster than any other existing method. Futhermore, it can be applied in molecular griddle, SNPs, biological membrane ion channel simulation, and Other important biochemical areas. Up to now, etched energetic heavy ion track nanochannel is the most potential nanochannel to accelerate its application. This paper deals chiefly with its preparation, research progress and application prospect in biology.
Nanochannel technology is a new method of sequencing nucleic acid directly, originated at the end of the tast century. The essestial principle is to translate the current signal into the nucleic acid sequence information by a patch clamp equipment as it passes through the nanochannel. This method is cheaper, simpler and faster than any other existing method. Futhermore, it can be applied in molecular griddle, SNPs, biological membrane ion channel simulation, and Other important biochemical areas. Up to now, etched energetic heavy ion track nanochannel is the most potential nanochannel to accelerate its application. This paper deals chiefly with its preparation, research progress and application prospect in biology.
2006, 23(1): 40-42.
doi: 10.11804/NuclPhysRev.23.01.040
Abstract:
Gastric tumour BGC823 cells cultured in natural and rich oxygenic（95 %O2＋5% CO2 ）environment are irradiated with energy of 20 MeV/u ^12C^6＋ ions at HIRFL. Average OER≈1 is deduced from survival curves for cells in natural and rich oxygenic environment. This relatively low OER value indicates that medium energy carbon ions are suitable for the cancerous therapy.
Gastric tumour BGC823 cells cultured in natural and rich oxygenic（95 %O2＋5% CO2 ）environment are irradiated with energy of 20 MeV/u ^12C^6＋ ions at HIRFL. Average OER≈1 is deduced from survival curves for cells in natural and rich oxygenic environment. This relatively low OER value indicates that medium energy carbon ions are suitable for the cancerous therapy.
2006, 23(1): 43-45.
doi: 10.11804/NuclPhysRev.23.01.043
Abstract:
A chemically induced premature chromosome condensation technique with Calyculin-A has been employed to estimate the initial chromosome damage in HepG2 condensed in G2 phase and the percentage of aberrant cells after exposure to γ-rays. The results show that the dose-response for iso-chromatid breaks is linear-quadratic manner, while chromatid-type breaks and total chromatid breaks show a positive linear dose-response. The percent tages of all kinds of aberrant cells are increasing linearly with increasing doses. G2 chromatid-type breaks and the percentage of G2 chromatid-type aberrant cells are predominate in G2 total chromatid breaks induced b y γ-rays.
A chemically induced premature chromosome condensation technique with Calyculin-A has been employed to estimate the initial chromosome damage in HepG2 condensed in G2 phase and the percentage of aberrant cells after exposure to γ-rays. The results show that the dose-response for iso-chromatid breaks is linear-quadratic manner, while chromatid-type breaks and total chromatid breaks show a positive linear dose-response. The percent tages of all kinds of aberrant cells are increasing linearly with increasing doses. G2 chromatid-type breaks and the percentage of G2 chromatid-type aberrant cells are predominate in G2 total chromatid breaks induced b y γ-rays.
2006, 23(1): 46-50.
doi: 10.11804/NuclPhysRev.23.01.046
Abstract:
The process of the single event upset induced by 14 MeV neutrons in SRAM silicon chip is simulated by using a Monte Carlo method. The deposited energies in sensitive volumes in the chip, which is an important factor in the single event upset, are statistically analysed. The statistic information about the deposited energies is provided for understanding the detailed random process of the single event upset.
The process of the single event upset induced by 14 MeV neutrons in SRAM silicon chip is simulated by using a Monte Carlo method. The deposited energies in sensitive volumes in the chip, which is an important factor in the single event upset, are statistically analysed. The statistic information about the deposited energies is provided for understanding the detailed random process of the single event upset.
2006, 23(1): 51-54.
doi: 10.11804/NuclPhysRev.23.01.051
Abstract:
Nuclear magnetic resonance（NMR） technology play an import role in improving nuclear material stockpile circumstances and long-term security management of nuclear waste materials. Based on analyzing the circumstance factor that influence the qualitative change of the nuclear material of uranium and plutonium during their stockpile, nuclear materials detection technology with NMR method was discussed, and at the same time, moisture measurement and the water molecule moving rule in nuclear materials during their stockpile were also studied with the same method in this paper.
Nuclear magnetic resonance（NMR） technology play an import role in improving nuclear material stockpile circumstances and long-term security management of nuclear waste materials. Based on analyzing the circumstance factor that influence the qualitative change of the nuclear material of uranium and plutonium during their stockpile, nuclear materials detection technology with NMR method was discussed, and at the same time, moisture measurement and the water molecule moving rule in nuclear materials during their stockpile were also studied with the same method in this paper.
2006, 23(1): 55-58.
doi: 10.11804/NuclPhysRev.23.01.055
Abstract:
The polymer foils irradiated by heavy ions can be used as temptates to prepai nanowires and some inorganic salt nanowires. It is called ＂ion-track template method＂. Compared to other templates, such as AAO template and porous silicon, etched ion-track template is more convenient and flexible. The density of the pores can be easily controlled by changing the ion fluences and the diameter of the pores can be altered through changing the etching condition. The pores of the etched ion-track template are well aligned. We present some examples of preparing metallic nanowires and inorganic salt wires by electrochemical deposition and by supersaturation solution method, respectively. We also introduce some applications of nanowires prepared with ion-track template method.
The polymer foils irradiated by heavy ions can be used as temptates to prepai nanowires and some inorganic salt nanowires. It is called ＂ion-track template method＂. Compared to other templates, such as AAO template and porous silicon, etched ion-track template is more convenient and flexible. The density of the pores can be easily controlled by changing the ion fluences and the diameter of the pores can be altered through changing the etching condition. The pores of the etched ion-track template are well aligned. We present some examples of preparing metallic nanowires and inorganic salt wires by electrochemical deposition and by supersaturation solution method, respectively. We also introduce some applications of nanowires prepared with ion-track template method.
2006, 23(1): 59-61.
doi: 10.11804/NuclPhysRev.23.01.059
Abstract:
Au and Al disk target were irradiated with -1 ns, 40-110 J, 527 nm laser at Xingguang-Ⅱ facility. The backscattered lights by laser-produced plasma were studied experimentally. The results are in troduced in this paper. Backscattered light energy is 7.8% of laser energy when laser is focused on Au disk target; when laser beam is smoothed, it is 6.2%. The comparison shows that laser smoothing can restrain backscattered light efficiency. The experimental results ：also show that there is a linear relation between backscattered light energy and the laser energy.
Au and Al disk target were irradiated with -1 ns, 40-110 J, 527 nm laser at Xingguang-Ⅱ facility. The backscattered lights by laser-produced plasma were studied experimentally. The results are in troduced in this paper. Backscattered light energy is 7.8% of laser energy when laser is focused on Au disk target; when laser beam is smoothed, it is 6.2%. The comparison shows that laser smoothing can restrain backscattered light efficiency. The experimental results ：also show that there is a linear relation between backscattered light energy and the laser energy.
2006, 23(1): 62-65.
doi: 10.11804/NuclPhysRev.23.01.062
Abstract:
The sensitivity of the correction factor, which describes the combined effect of finite film thickness and the thick substrate in the measurement of atomic inner-shell ionization cross-sections by low-energy electron impact, to the adopted ionization cross-sections in the Monte Carlo simulation is discussed. Moreover, the electron escape ratio from the Faraday cup in our experiment is also obtained by Monte Carlo method.
The sensitivity of the correction factor, which describes the combined effect of finite film thickness and the thick substrate in the measurement of atomic inner-shell ionization cross-sections by low-energy electron impact, to the adopted ionization cross-sections in the Monte Carlo simulation is discussed. Moreover, the electron escape ratio from the Faraday cup in our experiment is also obtained by Monte Carlo method.
2006, 23(1): 66-69.
doi: 10.11804/NuclPhysRev.23.01.066
Abstract:
A Parallel Plate Avalanche Counter （PPAC） with weighted about 40 g was developed for isotope separator on-line Moessbauer Spectroscopy. It detects the internal conversion electrons emitted from the resonance Moessbauer nuclide. The signal-to-noise ratio of the spectra reaches 11 for 85% enriched ^119SnO2 cathode and absorber. It is an effective detector for on-line Moessbauer experiments. The perform ance of the counter was discussed in detail.
A Parallel Plate Avalanche Counter （PPAC） with weighted about 40 g was developed for isotope separator on-line Moessbauer Spectroscopy. It detects the internal conversion electrons emitted from the resonance Moessbauer nuclide. The signal-to-noise ratio of the spectra reaches 11 for 85% enriched ^119SnO2 cathode and absorber. It is an effective detector for on-line Moessbauer experiments. The perform ance of the counter was discussed in detail.
2006, 23(1): 70-72.
doi: 10.11804/NuclPhysRev.23.01.070
Abstract:
In this paper, several methods and basic principles of neutron detecting latent explosive are introduced and analyzed in details. The progresses in this field are reviewed and further development direction is also prospected.
In this paper, several methods and basic principles of neutron detecting latent explosive are introduced and analyzed in details. The progresses in this field are reviewed and further development direction is also prospected.
2006, 23(1): 73-77.
doi: 10.11804/NuclPhysRev.23.01.073
Abstract:
The important progresses of studies on water loss and soil erosion using stable carbon, nitrogen isotopes and ^7Be, ^137Cs as tracers is introduced. The mechanisms and applications of the electron beam and y rays irradiation in industrial effluent disposal and tail gas treatment are discussed, which indicates the importances of the irradiation technology in environment protection.
The important progresses of studies on water loss and soil erosion using stable carbon, nitrogen isotopes and ^7Be, ^137Cs as tracers is introduced. The mechanisms and applications of the electron beam and y rays irradiation in industrial effluent disposal and tail gas treatment are discussed, which indicates the importances of the irradiation technology in environment protection.
2006, 23(1): 78-83.
doi: 10.11804/NuclPhysRev.23.01.078
Abstract:
The nuclear data measurements and preliminary evaluation as well as alculation for established and emerging 26 radionuclides produced in 55 ways by using reactor or accelerator or decay are briefly introduced in order to keep the safety and validity in medical therapeutic applications. The 11 established radionuclides are ^32P,^89Sr,^90Y,^103Pd,^125I,^131I,^137Cs,^153Sm,^186Re,^188Re,^192Ir and the 15 emerging radionuclides are 64Cu,^67Cu,^67Ga,^86Y,^105Rh,^111In,^114mIn,^124I,^149Pm,^166Ho,^169Yb,^177Lu,^211At,^213Bi,^225Ac.
The nuclear data measurements and preliminary evaluation as well as alculation for established and emerging 26 radionuclides produced in 55 ways by using reactor or accelerator or decay are briefly introduced in order to keep the safety and validity in medical therapeutic applications. The 11 established radionuclides are ^32P,^89Sr,^90Y,^103Pd,^125I,^131I,^137Cs,^153Sm,^186Re,^188Re,^192Ir and the 15 emerging radionuclides are 64Cu,^67Cu,^67Ga,^86Y,^105Rh,^111In,^114mIn,^124I,^149Pm,^166Ho,^169Yb,^177Lu,^211At,^213Bi,^225Ac.
2006, 23(1): 84-88.
doi: 10.11804/NuclPhysRev.23.01.084
Abstract:
The calculation formulas of energy balance and intensity balance from β^- decays are presented here. The example of ^95Nb β^- decay is shown to illustrate its practical application.
The calculation formulas of energy balance and intensity balance from β^- decays are presented here. The example of ^95Nb β^- decay is shown to illustrate its practical application.
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