Experimental evidence for the 8B ground state configuration

被引：60

作者：

Cortina-Gil, D ^{[1
]}

Markenroth, K

Attallah, F

Baumann, I

Benlliure, J

Borge, MJG

Chulkov, LV

Pramanik, UD

Fernandez-Vazquez, J

Forssén, C

Fraile, LM

Geissel, H

Gerl, J

Hammache, F

Itahashi, K

Janik, R

Jonson, B

Karlsson, S

Lenske, H

Mandal, S

Meister, M

Mocko, X

Münzenberg, G

Ohtsubo, T

Ozawa, A

Parfenova, Y

Pribora, V

Riisager, K

Scheit, H

Schneider, R

Schmidt, K

Schrieder, G

Simon, H

Sitar, B

Stolz, A

Strmen, P

Sümmerer, K

Szarka, I

Wan, S

Weick, H

Zhukov, M

机构：

[1] Univ Santiago de Compostela, E-15706 Santiago De Compostela, Spain

[2] Gesell Schwerionenforsch mbH, GSI Darmstadt, D-64291 Darmstadt, Germany

[3] Univ Gothenburg, Chalmers Tekn Hogskola, Adv Expt Fys, SE-41296 Gothenburg, Sweden

[4] Michigan State Univ, NSCL, E Lansing, MI 48824 USA

[5] CSIC, Inst Estructura Mat, E-28006 Madrid, Spain

[6] Kurchatov Inst, RU-123182 Moscow, Russia

[7] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 113, Japan

[8] Comenius Univ, Fac Math & Phys, Bratislava 84215, Slovakia

[9] Inst Theoret Phys 1, D-35392 Giessen, Germany

[10] Niigata Univ, Dept Phys, Niigata 9502181, Japan

[11] RIKEN, Wako, Saitama 35101, Japan

[12] Aarhus Univ, Inst Fys & Astron, DK-8000 Aarhus C, Denmark

[13] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[14] Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany

[15] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

来源：

PHYSICS LETTERS B | 2002年 / 529卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(02)01245-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Be-7 fragments produced in one-proton removal from relativistic B-8 nuclei of 936 MeV/nucleon in a carbon target have been detected in coincidence with gamma rays emitted by these fragments at the reaction target. It is found that 13 +/- 3% of the Be-7 fragments are released in the 429 keV excited state, Be-7*, which gives direct experimental information on the ground state configuration of B-8. The longitudinal momentum distributions (p(parallel to)) of the Be-7 fragments have been measured, both inclusively and in coincidence with de-excitation gamma-rays from Be-7*. The widths and cross sections of the respective p(parallel to) distributions are compared with calculations in a three-body cluster model. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：36 / 41

页数：6

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