Breakup of 12C resonances into three α particles

被引：61

作者：

Kirsebom, O. S. ^{[1
]}

Alcorta, M. ^{[2
]}

Borge, M. J. G. ^{[2
]}

Cubero, M. ^{[2
]}

Diget, C. A. ^{[3
]}

Dominguez-Reyes, R. ^{[2
]}

Fraile, L. M. ^{[4
]}

Fulton, B. R. ^{[3
]}

Fynbo, H. O. U. ^{[1
]}

Hyldegaard, S. ^{[1
]}

Jonson, B. ^{[5
]}

Madurga, M. ^{[2
]}

Munoz Martin, A. ^{[6
]}

Nilsson, T. ^{[5
]}

Nyman, G. ^{[5
]}

Perea, A.

Riisager, K. ^{[1
]}

Tengblad, O. ^{[2
]}

机构：

[1] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[2] CSIC, Inst Estruct Mat, ES-28006 Madrid, Spain

[3] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[4] CERN, PH Dept, CH-1211 Geneva 23, Switzerland

[5] Chalmers Univ Technol, SE-41296 Gothenburg, Sweden

[6] Univ Autonoma Madrid, CMAM, ES-28049 Madrid, Spain

来源：

PHYSICAL REVIEW C | 2010年 / 81卷 / 06期

关键词：

FINAL-STATE; NUCLEI; DECAYS;

D O I：

10.1103/PhysRevC.81.064313

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The reaction He-3 + B-11 -> d + C-12* has been used to populate resonances in C-12 up to an excitation energy of 15 MeV. The subsequent breakup to three alpha particles has been measured in complete kinematics. Dalitz plots are used to visualize and analyze the data. The Dalitz plot intensity distribution exhibits zero points characteristic of the total spin and parity of the 3 alpha system allowing us to determine the spin and parity of a state in C-12 at 13.35 MeV whose quantum numbers were hitherto not well established. The Dalitz plot intensity distributions of the 2(-) state at 11.83 MeV and the 1(+) state at 12.71 MeV are compared with the predictions of a recent three-body calculation as well as with simpler models. All are able to reproduce the gross structures seen in the Dalitz plot, but none give an accurate description of the detailed profile of the distributions.

引用

页数：9

共 29 条

[1] ENERGY-LEVELS OF LIGHT-NUCLEI A = 11-12 [J].

AJZENBERGSELOVE, F .

NUCLEAR PHYSICS A, 1990, 506 (01) :1-158

[2] A complete kinematics approach to study multi-particle final state reactions [J].

Alcorta, M. ;

Kirsebom, O. ;

Borge, M. J. G. ;

Fynbo, H. O. U. ;

Riisager, K. ;

Tengblad, O. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2009, 605 (03) :318-325

[3]

ALCORTA M, UNPUB

[4] Energy distributions from three-body decaying many-body resonances [J].

Alvarez-Rodriguez, R. ;

Jensen, A. S. ;

Fedorov, D. V. ;

Fynbo, H. O. U. ;

Garrido, E. .

PHYSICAL REVIEW LETTERS, 2007, 99 (07)

[5] Momentum distributions of α particles from decaying low-lying 12C resonances [J].

Alvarez-Rodriguez, R. ;

Jensen, A. S. ;

Garrido, E. ;

Fedorov, D. V. ;

Fynbo, H. O. U. .

PHYSICAL REVIEW C, 2008, 77 (06)

[6]

ALVAREZRODRIGUE.R, COMMUNICATION

[7] Proton-antiproton annihilation and mason spectroscopy with the Crystal Barrel [J].

Amsler, C .

REVIEWS OF MODERN PHYSICS, 1998, 70 (04) :1293-1339

[8] ISOSPIN-FORBIDDEN ALPHA-DECAY OF 15.11-MEV STATE IN C-12 [J].

BALAMUTH, DP ;

ZURMUHLE, RW ;

TABOR, SL .

PHYSICAL REVIEW C, 1974, 10 (03) :975-986

[9] Precise study of the final-state continua in 8Li and 8B decays [J].

Bhattacharya, M. ;

Adelberger, E. G. ;

Swanson, H. E. .

PHYSICAL REVIEW C, 2006, 73 (05)

[10] THEORY OF ANGULAR CORRELATION OF NUCLEAR RADIATIONS [J].

BIEDENHARN, LC ;

ROSE, ME .

REVIEWS OF MODERN PHYSICS, 1953, 25 (03) :729-777

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