## 2005年  第22卷  第1期

2005, 22(1): 1-2. doi: 10.11804/NuclPhysRev.22.01.001

2005, 22(1): 3-5. doi: 10.11804/NuclPhysRev.22.01.003

25 MeV/u 6He+9Be反应的实验中利用多个探测器望远镜对反应产物进行了测量, 对实验中各个角度测量到的4He进行观察, 将其中两个有高能峰成分的探测器划分成三部分, 得到不同角度4He的单举能谱和破裂产生4He的微分截面. Different products of 6He nuclei from 9Be target has been measured with a 6He beam at energy of 25 MeV/u. The energy spectra at different angles for 4He isotope were analyzed and the experiment differential cross sections for the direct breakup reaction were obtained.

2005, 22(1): 6-10. doi: 10.11804/NuclPhysRev.22.01.006

2005, 22(1): 11-16. doi: 10.11804/NuclPhysRev.22.01.011

2005, 22(1): 17-19. doi: 10.11804/NuclPhysRev.22.01.017

The analysis shows that a simple harmonicoscillator (HO) density is not adequate to explain consistently the present experimental data and the one at high energy simultaneously. To get a better fit of both the data, the existence of a tail in the density distribution of 17C is proposed. Based on the assumption of a core plus a single neutron, it is found that the valence neutron of 17C is mostly in the dorbital. This is in agreement with the conclusion from the measured momentum distribution.

2005, 22(1): 20-22. doi: 10.11804/NuclPhysRev.22.01.020

2005, 22(1): 23-26. doi: 10.11804/NuclPhysRev.22.01.023

2005, 22(1): 27-28. doi: 10.11804/NuclPhysRev.22.01.027

By adding isospin dependent high order correction ferms to existing relativistic mean field models．tlle thickness of neuron．skin in 208Pb and the radius of 1
.4 solar mass neutron star are studied．The effecfive interaction PK1 would lead the thickness of neutron-skin to a minimum of 0.17 fm which agrees with the analysis from Skyrme‘HF models． The coupling constants of the isospin dependent high order corection terms tend to change，the thickness of neutron-skin and the radius of neutron stars chan ge simultaneously.

2005, 22(1): 29-31. doi: 10.11804/NuclPhysRev.22.01.029

The density dependencies of various effective interaction strengths in the relativistic mean field and their influences on the properties of nuclear matter and neutron stars are studied and carefully compared. The differences of saturation properties given by various effective interactions are subtle in symmetric nuclear matter. The OppenheimerVolkoff mass limits of neutron stars calculated from different equations of state are 1.52—2.06 M☉, and the radii are 10.24—11.38 km with hyperons included.
2005, 22(1): 32-33. doi: 10.11804/NuclPhysRev.22.01.032

After adding isospin dependent high order correction terms to existing relativistic mean field models (RMF), the density dependence of symmetry energy and the neutron skin thickness S for 208Pb are studied. Using the new effective interaction PK1, together with NL3, S271 and Z271, a range of 29—38 MeV for the symmetry energy for nuclear matter at saturation point and the corresponding neutron skin thickness S = 0.14—0.28 fm for 208Pb are obtained. For all effective interactions, a linear relation between the symmetry energy at saturation point and the neutron skin thickness for 208Pb is observed.

2005, 22(1): 34-35. doi: 10.11804/NuclPhysRev.22.01.034

2005, 22(1): 36-38. doi: 10.11804/NuclPhysRev.22.01.036

2005, 22(1): 39-43. doi: 10.11804/NuclPhysRev.22.01.039

2005, 22(1): 44-46. doi: 10.11804/NuclPhysRev.22.01.044

The advance of tumor therapy with heavy ions beam is due to the physics quality of heavy ions.So,the investigation of heavy ions action with biological materials will be a basic task. In the paper, the investigated results show a picture to resolve some problems which attract people＇s attention.

2005, 22(1): 47-79. doi: 10.11804/NuclPhysRev.22.01.047

2005, 22(1): 50-53. doi: 10.11804/NuclPhysRev.22.01.050

2005, 22(1): 54-57. doi: 10.11804/NuclPhysRev.22.01.054

The quadrupole interactions in the nanoand crystalline LaFeO3 perovskites have been investigated by TDPAC. The TDPAC probing nuclei 14057La14058Ce were produced through the nuclear reaction 139La(n.γ)140La at the CIAE heavy water experimental reactor. One electric quadrupole interaction was detected for each material, which is assigned to the La site. The quadrupole interaction frequencies of 687.4, 698.3 and 742.9 Mrad/s with a distribution coefficient of 0.014, 0.009 and 0.001 were observed at room temperature for the 20 and 40 nm nanoLaFeO3 and crystalline LaFeO3, respectively. The fitting yielded the EFG asymmetry parameter η=0, which indicates that the principal axes of the EFG is aligned with the crystallographic axes. The experimental results show that the structure of crystalline LaFeO3 is rhombohedral, the changing of the structure towards the orthorhombic structure takes place from the crystalline LaFeO3 to the nanoLaFeO3, and the smaller the nanograin size, the larger the change. The frequency distribution is caused by the perturbation of the neighboring atoms, and thus, the distribution coefficient increases with decreasing the nanograin size and the crystalline LaFeO3 arrives at its maximum.
2005, 22(1): 58-60. doi: 10.11804/NuclPhysRev.22.01.058

2005, 22(1): 61-63. doi: 10.11804/NuclPhysRev.22.01.061

2005, 22(1): 64-66. doi: 10.11804/NuclPhysRev.22.01.064

n, γ混合脉冲辐射场中, 在近距离、辐射强度低且中子辐射峰值比被测γ辐射峰值强度高的情况下, 传统γ辐射探测技术实施起来面临困难. 对PbWO4和CeF3等近年国内新研制的无机闪烁体进行了系列研究, 使用CeF3分别配光电倍增管和光电管,组合出了对γ辐射灵敏度高, 对中子相对不灵敏, 同时脉冲响应也快的光电探测系统, 应用以此为基础的探测技术在近距离n, γ混合脉冲辐射场中, 可将脉冲γ辐射探测信噪比提高一个量级以上.
It is difficult to detect low intensity γ radiation by using traditional γ radiation detection technique in a close distance n, γ commix pulse radiation field with very high intensity neutron radiation. PbWO4 and CeF3 which are newly developed inorganic scintillator in our country have been studied. Photoelectricity detector systemes which have high γ sensitivity and relative insensitive to neutron and fast time response were assembled by using CeF3 and photomultiplier tube. The ratio of signaltonoise for γ ray detection can be up to more than 10 times in close distance n, γ commix pulse radiation field by using this detector system.

2005, 22(1): 67-71. doi: 10.11804/NuclPhysRev.22.01.067

2005, 22(1): 72-75. doi: 10.11804/NuclPhysRev.22.01.072

2005, 22(1): 76-78. doi: 10.11804/NuclPhysRev.22.01.076

2005, 22(1): 79-80. doi: 10.11804/NuclPhysRev.22.01.079

2005, 22(1): 81-83. doi: 10.11804/NuclPhysRev.22.01.081

2005, 22(1): 84-87. doi: 10.11804/NuclPhysRev.22.01.084

2005, 22(1): 88-90. doi: 10.11804/NuclPhysRev.22.01.088

A nuclear microprobe was set up at the Institute of Modern Physics of Fudan University.The key parts were imported from Oxford Microbeams Ltd.The hardware system of the microprobe,including beam line,target chamber,focusing system and DAQ system is introduced. About several micrometer could be achieved at present beam spot size.

2005, 22(1): 91-93. doi: 10.11804/NuclPhysRev.22.01.091

2005, 22(1): 94-96. doi: 10.11804/NuclPhysRev.22.01.094

γ射线与晶体单元的相互作用特性对于PET探测器的研制有着重要的参考意义. 通过实验测得了不同能量的γ射线在BGO, CsI, NaI 3种闪烁晶体中的探测效率、 能量分辨率等相互作用特性参数, 并与蒙特卡洛模拟结果进行了比较. 结果给出了最适合PET探测器的晶体单元. It’s important for development of PET detector that the interaction effect of γrays and scintillator units are studied. The detection efficiencies and energy resolutions of γrays for BGO, CsI and NaI crystal detector units are measured. Geant4 Monte Carlo simulations are compared with the experimental results. The results of the best detection units for PET detector are presented.

2005, 22(1): 97-99. doi: 10.11804/NuclPhysRev.22.01.097

2005, 22(1): 100-102. doi: 10.11804/NuclPhysRev.22.01.100

2005, 22(1): 103-105. doi: 10.11804/NuclPhysRev.22.01.103

Neutroninduced promptγ activation analysis(PGNAA),is one of the nuclear analytical method,which is a powerful tool for H,B,etc.undestructive determination.The applications of PGNAA are increased in recent years.In this paper,the basic principle of PGNAA was introduced briefly.The facilities of PGNAA in HWRR of China Institute of Atomic Energy as well as the efficiency calibration for a wide range gamma from 50 keV to 10 MeV were emphasized.A deep sea polymetallic nodule CRM,GSPN3 was analyzed by using PGNAA in this work,the results have agreement with the certified values.
2005, 22(1): 106-109. doi: 10.11804/NuclPhysRev.22.01.106

2005, 22(1): 110-114. doi: 10.11804/NuclPhysRev.22.01.110

2005, 22(1): 115-117. doi: 10.11804/NuclPhysRev.22.01.115

2005, 22(1): 118-121. doi: 10.11804/NuclPhysRev.22.01.118

High power density electron beams generated by multiplate pseudospark discharge chamber, have been used to bombard various kinds of steel targets such as 45#, 65Mn, T8, 9Cr18, GCr15, etc, and studyits applications for modification of metal surface. The microhardness and corrosive resistance property have been measured and the morphology was obtained by using SEM analysis. The results showed that the surface properties and structure of the matevials bom barded have been modified; in the bombarded center area, the microhardness as well as corrosive resistance property was improved obviously. The interactions befween the electron beam and metal materials were theoretically considered and discussed on the basis of simple calculation with one dimensional thermal transfer equation. It showed that the cooling rate of metal surface with 1.2×1012 ℃/s was so high that caused the metal surface instant melted, and abrupt cooled.
2005, 22(1): 122-124. doi: 10.11804/NuclPhysRev.22.01.122

2005, 22(1): 125-126. doi: 10.11804/NuclPhysRev.22.01.125

2005, 22(1): 127-130. doi: 10.11804/NuclPhysRev.22.01.127

2005, 22(1): 131-134. doi: 10.11804/NuclPhysRev.22.01.131

2005, 22(1): 135-137. doi: 10.11804/NuclPhysRev.22.01.135

2005, 22(1): 138-141. doi: 10.11804/NuclPhysRev.22.01.138

Provenance characteristic is an important scientific parameter to identify ancient porcelain wares unearthed from sites and graves.The porcelain samples of SiLongKou kiln of Zhejiang Province,HongZhou kiln of Jiangxi Province and Yao Zhou kiln of Shanxi Province have been analyzed with neutron activation analysis(NAA) in this paper.The experimental data were studied with statistic methods.The results show that the chemical compositions of porcelain body samples for three kilns were different. The difference was been able identified. The body materials of both SiLongKou Yue kiln and HongZhou kiln of Jiangxi were similar. The samples of YaoZhou kiln in north of China existed obvious difference.

2005, 22(1): 142-144. doi: 10.11804/NuclPhysRev.22.01.142

2005, 22(1): 145-147. doi: 10.11804/NuclPhysRev.22.01.145

2005, 22(1): 148-152. doi: 10.11804/NuclPhysRev.22.01.148