Observation of Enhanced Monopole Strength and Clustering in 12Be

被引：111

作者：

Yang, Z. H. ^{[1
]}

Ye, Y. L. ^{[1
]}

Li, Z. H. ^{[1
]}

Lou, J. L. ^{[1
]}

Wang, J. S. ^{[1
]}

Jiang, D. X. ^{[1
]}

Ge, Y. C. ^{[1
]}

Li, Q. T. ^{[1
]}

Hua, H. ^{[1
]}

Li, X. Q. ^{[1
]}

Xu, F. R. ^{[1
]}

Pei, J. C. ^{[1
]}

Qiao, R. ^{[1
]}

You, H. B. ^{[1
]}

Wang, H. ^{[1
,3
]}

Tian, Z. Y. ^{[1
]}

Li, K. A. ^{[1
]}

Sun, Y. L. ^{[1
]}

Liu, H. N. ^{[1
,3
]}

Chen, J. ^{[1
]}

Wu, J. ^{[1
,3
]}

Li, J. ^{[1
]}

Jiang, W. ^{[1
]}

Wen, C. ^{[1
,3
]}

Yang, B. ^{[1
]}

Yang, Y. Y. ^{[2
]}

Ma, P. ^{[2
]}

Ma, J. B. ^{[2
]}

Jin, S. L. ^{[2
]}

Han, J. L. ^{[2
]}

Lee, J. ^{[3
]}

机构：

[1] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[2] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[3] RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 16期

关键词：

INELASTIC-SCATTERING; MOLECULAR-STATES; NEUTRON-RICH; NUCLEAR; SPECTROSCOPY; EXCITATION; ISOTOPES; PHYSICS; BEAM;

D O I：

10.1103/PhysRevLett.112.162501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In a recent breakup-reaction experiment using a Be-12 beam at 29 MeV/nucleon, the 0(+) band head of the expected He-4 + He-8 molecular rotation was clearly identified at about 10.3 MeV, from which a large monopole matrix element of 7.0 +/- 1.0 fm(2) and a large cluster-decay width were determined for the first time. These findings support the picture of strong clustering in Be-12, which has been a subject of intense investigations over the past decade. The results were obtained thanks to a specially arranged detection system around zero degrees, which is essential in determining the newly emphasized monopole strengths to signal the cluster formation in a nucleus.

引用

页数：5

共 38 条

[1] Properties of 12C resonances determined from the 10B(3He, pααα) and 11B(3He, dααα) reactions studied in complete kinematics [J].

Alcorta, M. ;

Borge, M. J. G. ;

Cubero, M. ;

Diget, C. Aa. ;

Dominguez-Reyes, R. ;

Fraile, L. M. ;

Fulton, B. R. ;

Fynbo, H. O. U. ;

Galaviz, D. ;

Hyldegaard, S. ;

Jeppesen, H. ;

Jonson, B. ;

Kirsebom, O. S. ;

Madurga, M. ;

Maira, A. ;

Munoz-Martin, A. ;

Nilsson, T. ;

Nyman, G. ;

Obradors, D. ;

Perea, A. ;

Riisager, K. ;

Tengblad, O. ;

Turrion, M. .

PHYSICAL REVIEW C, 2012, 86 (06)

[2] Helium clustering in neutron-rich Be isotopes [J].

Ashwood, NI ;

Freer, M ;

Ahmed, S ;

Angélique, JC ;

Bouchat, V ;

Catford, WN ;

Clarke, NM ;

Curtis, N ;

Dorvaux, O ;

Fulton, BR ;

Hanappe, F ;

Kerckx, Y ;

Labiche, M ;

Lecouey, JL ;

Lemmon, RC ;

Marqués, FM ;

Materna, T ;

Ninane, A ;

Normand, G ;

Orr, NA ;

Pain, S ;

Soic, N ;

Stuttgé, L ;

Timis, C ;

Unshakova, A ;

Winfield, JS ;

Ziman, VA .

PHYSICS LETTERS B, 2004, 580 (3-4) :129-136

[3] Neutron correlations in 6He viewed through nuclear break-up [J].

Assie, M. ;

Scarpaci, J. A. ;

Lacroix, D. ;

Angelique, J. C. ;

Bazin, D. ;

Beaumel, D. ;

Blumenfeld, Y. ;

Catford, W. N. ;

Chabot, M. ;

Chatterjee, A. ;

Fallot, M. ;

Iwasaki, H. ;

Marechal, F. ;

Mengoni, D. ;

Monrozeau, C. ;

Nyberg, J. ;

Petrache, C. ;

Skaza, F. ;

Tuna, T. .

EUROPEAN PHYSICAL JOURNAL A, 2009, 42 (03) :441-446

[4] ELASTIC AND INELASTIC-SCATTERING OF CARBON-IONS AT INTERMEDIATE ENERGIES [J].

BUENERD, M ;

LOUNIS, A ;

CHAUVIN, J ;

LEBRUN, D ;

MARTIN, P ;

DUHAMEL, G ;

GONDRAND, JC ;

DESAINTIGNON, P .

NUCLEAR PHYSICS A, 1984, 424 (02) :313-334

[5] 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

[6] Conference summary: an experimental perspective [J].

Catford, W. N. .

10TH INTERNATIONAL CONFERENCE ON CLUSTERING ASPECTS OF NUCLEAR STRUCTURE AND DYNAMICS (CLUSTER'12), 2013, 436

[7] Particle decay of 12Be excited states [J].

Charity, R. J. ;

Komarov, S. A. ;

Sobotka, L. G. ;

Clifford, J. ;

Bazin, D. ;

Gade, A. ;

Lee, Jenny ;

Lukyanov, S. M. ;

Lynch, W. G. ;

Mocko, M. ;

Lobastov, S. P. ;

Rogers, A. M. ;

Sanetullaev, A. ;

Tsang, M. B. ;

Wallace, M. S. ;

Hudan, S. ;

Metelko, C. ;

Famiano, M. A. ;

Wuosmaa, A. H. ;

van Goethem, M. J. .

PHYSICAL REVIEW C, 2007, 76 (06)

[8] α-decaying states in 10,12Be populated in the 10Be(14C,10,12Be) reaction [J].

Curtis, N. ;

Ashwood, N. I. ;

Baby, L. T. ;

Baldwin, T. D. ;

Bloxham, T. R. ;

Catford, W. N. ;

Caussyn, D. D. ;

Freer, M. ;

Harlin, C. W. ;

McEwan, P. ;

Price, D. L. ;

Spingler, D. ;

Wiedenhover, I. .

PHYSICAL REVIEW C, 2006, 73 (05)

[9] Microscopic investigation of the 12Be spectroscopy [J].

Dufour, M. ;

Descouvemont, P. ;

Nowacki, F. .

NUCLEAR PHYSICS A, 2010, 836 (3-4) :242-255

[10] α:2n:α molecular band in 10Be -: art. no. 042501 [J].

Freer, M ;

Casarejos, E ;

Achouri, L ;

Angulo, C ;

Ashwood, NI ;

Curtis, N ;

Demaret, P ;

Harlin, C ;

Laurent, B ;

Milin, M ;

Orr, NA ;

Price, D ;

Raabe, R ;

Soic, N ;

Ziman, VA .

PHYSICAL REVIEW LETTERS, 2006, 96 (04)

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