Ab Initio Description of the Exotic Unbound 7He Nucleus

被引：111

作者：

Baroni, Simone ^{[1
,2
]}

Navratil, Petr ^{[2
,3
]}

Quaglioni, Sofia ^{[3
]}

机构：

[1] Univ Libre Bruxelles, B-1050 Brussels, Belgium

[2] TRIUMF, Vancouver, BC V6T 2A3, Canada

[3] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

MONTE-CARLO CALCULATIONS; STATE;

D O I：

10.1103/PhysRevLett.110.022505

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The neutron-rich unbound He-7 nucleus has been the subject of many experimental investigations. While the ground-state 3/2(-) resonance is well established, there is a controversy concerning the excited 1/2(-) resonance reported in some experiments as low lying and narrow (E-R similar to 1 MeV, Gamma <= 1 MeV) while in others as very broad and located at a higher energy. This issue cannot be addressed by ab initio theoretical calculations based on traditional bound-state methods. We introduce a new unified approach to nuclear bound and continuum states based on the coupling of the no-core shell model, a bound-state technique, with the no-core shell model combined with the resonating-group method, a nuclear scattering technique. Our calculations describe the ground-state resonance in agreement with experiment and, at the same time, predict a broad 1/2(-) resonance above 2 MeV. DOI: 10.1103/PhysRevLett.110.022505

引用

页数：5

共 45 条

[1] Properties of the 7He ground state from 8He neutron knockout [J].

Aksyutina, Yu. ;

Johansson, H. T. ;

Aumann, T. ;

Boretzky, K. ;

Borge, M. J. G. ;

Chatillon, A. ;

Chulkov, L. V. ;

Cortina-Gil, D. ;

Pramanik, U. Datta ;

Emling, H. ;

Forssen, C. ;

Fynbo, H. O. U. ;

Geissel, H. ;

Ickert, G. ;

Jonson, B. ;

Kulessa, R. ;

Langer, C. ;

Lantz, M. ;

LeBleis, T. ;

Lindahl, A. O. ;

Mahata, K. ;

Meister, M. ;

Muenzenberg, G. ;

Nilsson, T. ;

Nyman, G. ;

Palit, R. ;

Paschalis, S. ;

Prokopowicz, W. ;

Reifarth, R. ;

Richter, A. ;

Riisager, K. ;

Schrieder, G. ;

Simon, H. ;

Suemmerer, K. ;

Tengblad, O. ;

Weick, H. ;

Zhukov, M. V. .

PHYSICS LETTERS B, 2009, 679 (03) :191-196

[2]

[Anonymous], private communication

[3]

Baroni S., IN PRESS

[4] Spectroscopic factor of the 7He ground state [J].

Beck, F. ;

Frekers, D. ;

von Neumann-Cosel, P. ;

Richter, A. ;

Ryezayeva, N. ;

Thompson, I. J. .

PHYSICS LETTERS B, 2007, 645 (2-3) :128-132

[5] Similarity renormalization group for nucleon-nucleon interactions [J].

Bogner, S. K. ;

Furnstahl, R. J. ;

Perry, R. J. .

PHYSICAL REVIEW C, 2007, 75 (06)

[6] From low-momentum interactions to nuclear structure [J].

Bogner, S. K. ;

Furnstahl, R. J. ;

Schwenk, A. .

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, 2010, 65 (01) :94-147

[7] Spectroscopy of 7He states using the (15N, 17F) reaction on 9Be -: art. no. 024312 [J].

Bohlen, HG ;

Kalpakchieva, R ;

Blazevic, A ;

Gebauer, B ;

Massey, TN ;

von Oertzen, W ;

Thummerer, S .

PHYSICAL REVIEW C, 2001, 64 (02) :243121-2431211

[8] Doppler shift as a tool for studies of isobaric analog states of neutron-rich nuclei:: Application to 7He -: art. no. 132502 [J].

Boutachkov, P ;

Rogachev, GV ;

Goldberg, VZ ;

Aprahamian, A ;

Becchetti, FD ;

Bychowski, JP ;

Chen, Y ;

Chubarian, G ;

DeYoung, PA ;

Kolata, JJ ;

Lamm, LO ;

Peaslee, GF ;

Quinn, M ;

Skorodumov, BB ;

Wöhr, A .

PHYSICAL REVIEW LETTERS, 2005, 95 (13)

[9] Quantum Monte Carlo calculations of spectroscopic overlaps in A ≤ 7 nuclei [J].

Brida, I. ;

Pieper, Steven C. ;

Wiringa, R. B. .

PHYSICAL REVIEW C, 2011, 84 (02)

[10] Recoil proton tagged knockout reaction for 8He [J].

Cao, Z. X. ;

Ye, Y. L. ;

Xiao, J. ;

Lv, L. H. ;

Jiang, D. X. ;

Zheng, T. ;

Hua, H. ;

Li, Z. H. ;

Li, X. Q. ;

Ge, Y. C. ;

Lou, J. L. ;

Qiao, R. ;

Li, Q. T. ;

You, H. B. ;

Chen, R. J. ;

Pang, D. Y. ;

Sakurai, H. ;

Otsu, H. ;

Nishimura, M. ;

Sakaguchi, S. ;

Baba, H. ;

Togano, Y. ;

Yoneda, K. ;

Li, C. ;

Wang, S. ;

Wang, H. ;

Li, K. A. ;

Nakamura, T. ;

Nakayama, Y. ;

Kondo, Y. ;

Deguchi, S. ;

Satou, Y. ;

Tshoo, K. .

PHYSICS LETTERS B, 2012, 707 (01) :46-51

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