MEASUREMENT OF THE PROTON-PROTON CORRELATION FUNCTION FROM THE BREAK-UP OF 22Mg AND 20Ne

Author:

SUN X. Y.12,CHEN J. G.1,FANG D. Q.1,MA Y. G.1,CAI X. Z.1,GUO W.1,TIAN W. D.1,WANG H. W.1,ZHOU P.12,ZHANG G. Q.12,CAO X. G.12,FU Y.12,HU Z. G.3,WANG J. S.3,WANG M.3,TOGANO Y.4,AOI N.4,BABA H.4,HONDA T.5,OKADA K.5,HARA Y.5,IEKI K.5,ISHIBASHI Y.6,ITOU Y.6,IWASA N.7,KANNO S.4,KAWABATA T.8,KIMURA H.9,KONDO Y.4,KURITA K.5,KUROKAWA M.4,MORIGUCHI T.6,MURAKAMI H.4,OISHI H.6,OTA S.8,OZAWA A.6,SAKURAI H.4,SHIMOURA S.8,SHIODA R.5,TAKESHITA E.4,TAKEUCHI S.4,YAMADA K.4,YAMADA Y.5,YASUDA Y.6,YONEDA K.4,MOTOBAYASHI T.4

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

5. Department of Physics, Rikkyo University, Japan

6. Institute of Physics, University of Tsukuba, Ibaraki, Japan

7. Department of Physics, Tohoku University, Japan

8. Department of Physics, University of Kyoto, Japan

9. Department of Physics, University of Tokyo, Japan

Abstract

An experiment of 22 Mg and 20 Ne beams bombarding on a 12 C target at an energy of 60~70 A MeV has been performed at the RIKEN projectile fragment separator (RIPS) in the RIKEN Ring Cyclotron Facility to study the two-proton correlated emission from 22 Mg and 20 Ne excited states. The two-protons momentum correlation functions have been obtained for 22 Mg and 20 Ne , respectively. The trajectories of the 22 Mg decayed products (20 Ne + p + p ) were also measured to get the angular correlations between the two protons in Center of Mass of decaying system by relativistic-kinematics reconstruction. The results exhibit that 22 Mg has the features of 2 He cluster decay mechanism.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Physics and Astronomy,Nuclear and High Energy Physics

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