Invariant Mass Spectroscopy for the Neutron Rich Nuclei

다국어 초록 (Multilingual Abstract)

The neutron-rich carbon isotopes ^(19,17)C and a boron isotope ^(14)B are investigated respectively via proton inelastic and charge-exchange reactions on a liquid hydrogen target at around 70 MeV/nucleon at RIKEN. The invariant mass method in inverse kinematics involving coincidence detection of a charged fragment and a neutron both emitted at forward angles is employed to map the energy spectrum above the neutron decay threshold. Several resonance structures are revealed in the invariant mass spectra, and the nature for some of them is discussed from comparisons of differential cross section data with predictions of microscopic DWBA calculations based on spsdpf shell model wave functions and a recent parametrization of semi-microscopic nucleon-nucleus optical model potential (JLMB). By extrapolating the (p,n) cross sections leading to the 1^+ state at 1.27 MeV in ^(141)B to zero momentum transfer the Gamow-Teller transition strength is deduced. The value is found to compare well with that reported in a β-delayed neutron emission study.

참고문헌 (Reference)

1 E. Sauvan, 491 : 1-, 2000

2 H. Ogawa, 13 : 81-, 2002

3 H. G. Bohlen, 31 : 279-, 2007

4 H. Ogawa, 67 : 064308-, 2003

5 C. D. Goodman, 44 : 1755-, 1980

6 T. N. Taddeucci, 469 : 125-, 1987

7 U. D. Pramanik, 551 : 63-, 2003

8 V. Maddalena, 63 : 024613-, 2001

9 Phys. Rev. Lett, 83 : 1112-, 1999

10 D. Bazin, 74 : 3569-, 1995

11 A. J. Koning, 713 : 231-, 2003

12 R. L. Varner, 201 : 57-, 1991

13 J. R. Comfort, 24 : 1834-, 1981

14 J. R. Comfort, 21 : 2147-, 1980

15 J. R. Comfort, 26 : 1800-, 1982

16 S. Cohen, 73 : 1-, 1965

17 F. Ajzenberg-Selove, 506 : 1-, 1990

18 K. Amos, 25 : 275-, 2000

19 G. Audi, 729 : 337-, 2003

20 T. Nakamura, 331 : 296-, 1994

21 T. Nakamura, 96 : 252502-, 2006

22 N. Fukuda, 70 : 054606-, 2004

23 Y. Satou, 660 : 320-, 2008

24 A. Ozawa, 84 : 5493-, 2000

25 T. Kajino, 480 : 175-, 1988

26 A. Heger, 86 : 1678-, 2001

27 A. Heger, 606 : 258-, 2005

28 A. Byelikov, 98 : 082501-, 2007

29 H. Sagawa, 303 : 215-, 1993

30 J. A. Brown, 54 : 2105-, 1996

31 M. D. Cortina-Gil, 371 : 14-, 1996

32 Z. Li, 527 : 50-, 2002

33 T. Teranishi, 407 : 110-, 1997

34 S. Takeuchi, 515 : 255-, 2001

35 Y. Yanagisawa, 566 : 84-, 2003

36 M. Belbot, 56 : 3038-, 1997

37 N. Aoi, 66 : 014301-, 2002

38 T. Kubo, 70 : 309-, 1992

39 H. Ryuto, 555 : 1-, 2005

40 T. N. Taddeucci, 41 : 2548-, 1990

41 A. M. Lane, 30 : 257-, 1958

42 G. C. Ball, 31 : 395-, 1973

43 R. Kalpakchieva, 7 : 451-, 2000

44 B. D. Anderson, 169 : 153-, 1980

45 E. Bauge, 63 : 024607-, 2001

46 J. P. Jeukenne, 16 : 80-, 1977

47 B. A. Brown, 58 : 220-, 1998

48 A. Ozawa, 693 : 32-, 2001

49 G. Bertsch, 284 : 399-, 1977

50 E. K. Warburton, 46 : 923-, 1992

51 W. G. Love, "The (p,n) reaction and the Nucleon-Nucleon Force" Plenum 23-, 1980

52 R. Schaeer, "Program DWBA70 (unpub- lished), J. R. Comfort, Extended version DW81"

53 B. A. Brown, "Nushell@MSU MSU- NSCL"

54 M. N. Harakeh, "Giant Resonances" 2001