MEASUREMENTS OF REACTION CROSS SECTION AND FRAGMENT MOMENTUM DISTRIBUTION FOR N=10 PROTON-RICH ISOTONES

Author:

GUO W.12,FANG D. Q.1,MA Y. G.1,MA C. W.12,WANG K.12,YAN T. Z.12,CAI X. Z.1,SHEN W. Q.1,SUN Z. Y.3,REN Z. Z.4,CHEN J. G.1,CHEN J. H.12,LIU G. H.12,MA E. J.12,MA G. L.12,SHI Y.12,SU Q. M.12,TIAN W. D.1,WANG H. W.1,ZHONG C.1,ZUO J. X.12,HOSOI M.5,IZUMIKAWA T.6,KANUNGO R.7,NAKAJIMA S.5,OHNISHI T.8,OHTSUBO T.6,OZAWA A.9,SUDA T.8,SUGAWARA K.5,SUZUKI T.5,TAKISAWA A.6,TANAKA K.8,YAMAGUCHI T.5,TANIHATA I.7

Affiliation:

1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

3. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

4. Department of Physics, Nanjing University, Nanjing 210008, China

5. Department of Physics, Saitama University, Saitama 338-8570, Japan

6. Department of Physics, Niigata University, Niigata 950-2181, Japan

7. TRIUMF, 4004 Wesbrook Mal, Vancouver, British Columbia V6T 2A3, Canada

8. Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan

9. Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan

Abstract

The longitudinal momentum (p//) distributions of fragments after one-proton removal and reaction cross sections (σR) for several N = 10 isotones at intermediate energy (~ 70A MeV ) have been measured simultaneously at the RIken Projectile fragment Separator (RIPS). p// was measured using a direct time-of-flight (TOF) technique, while σR was determined using a transmission method. An enhanced σR is observed for 23 Al comparing with its neighbors. The p// distribution for 22 Mg fragments from 23 Al one-proton removal reaction has been obtained for the first time. The experimental data are discussed within a Few Body Glauber (FBG) framework. Analysis of p// indicates a dominant d-wave component in the ground state of 23 Al . This agrees with recent experimental results. We also suggest the possibility of an enlarged 22 Mg core for proton-rich nucleus 23 Al .

Publisher

World Scientific Pub Co Pte Lt

Subject

General Physics and Astronomy,Nuclear and High Energy Physics

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