THE 1ST EXCITED-STATE OF BE-8 STUDIED IN THE LI-7(P,GAMMA)BE-8 REACTION

被引：4

作者：

RICKEN, L

BODEK, K

SZCZUREK, A

机构：

[1] RUHR UNIV BOCHUM,INST EXPTL PHYS 1,W-4630 BOCHUM,GERMANY

[2] JAGIELLONIAN UNIV,INST PHYS,PL-30059 KRAKOW,POLAND

来源：

NUCLEAR PHYSICS A | 1990年 / 515卷 / 02期

关键词：

NUCLEAR REACTIONS;

D O I：

10.1016/0375-9474(90)90367-U

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

In order to study the intrinsic line shape of the broad first excited 2+ state of 8Be, the radiative capture reaction 7Li(p,γ)8Be has been investigated in an energy range close to the center of the giant dipole resonance built upon this state. A large NaI(Tl) spectrometer with a well-known response function is employed. The data are fitted with spectral density functions derived from αα phase shifts in the framework of the R- matrix theory. The optimum value of the channel radius obtained from the fits, a = 4.5 fm, is in agreement with the value deduced from a similar analysis of a kinematically complete coincidence study of the 9Be(d,tα)4He reaction. The calculated spectral density function for a = 4.5 fm reaches its maximum at Ex = 2.91 MeV, the width (FWHM) is 1.23 MeV. © 1990.

引用

页码：226 / 236

页数：11