Reexamination of the excited states of 12C

被引:84
作者
Freer, M. [1 ]
Boztosun, I.
Bremner, C. A.
Chappell, S. P. G.
Cowin, R. L.
Dillon, G. K.
Fulton, B. R.
Greenhalgh, B. J.
Munoz-Britton, T.
Nicoli, M. P.
Rae, W. D. M.
Singer, S. M.
Sparks, N.
Watson, D. L.
Weisser, D. C.
机构
[1] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England
[2] Univ Oxford, Nucl & Astrophys Lab, Oxford OX1 3RH, England
[3] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England
[4] Australian Natl Univ, Dept Nucl Phys, Canberra, ACT 0200, Australia
来源
PHYSICAL REVIEW C | 2007年 / 76卷 / 03期
关键词
D O I
10.1103/PhysRevC.76.034320
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
An analysis of the C-12(C-12,3 alpha)C-12 reaction was made at beam energies between 82 and 106 MeV. Decays to both the ground state and the excited states of Be-8 were isolated, allowing states of different characters to be identified. In particular, evidence was found for a previously observed state at 11.16 MeV. An analysis of the angular distributions of the unnatural parity states at 11.83 and 13.35 MeV, previously assigned J(pi)=2(-), calls into question the validity of these assignments, suggesting that at least one of the states may correspond to J(pi)=4(-). Evidence is also found for 1(-) and 3(-) strengths associated with broad states between 11 and 14 MeV.
引用
收藏
页数:9
相关论文
共 25 条
  • [1] ENERGY-LEVELS OF LIGHT-NUCLEI A = 11-12
    AJZENBERGSELOVE, F
    [J]. NUCLEAR PHYSICS A, 1990, 506 (01) : 1 - 158
  • [2] ENERGY LEVELS OF LIGHT NUCLEI (7) A=11-12
    AJZENBERGSELOVE, F
    VAURITSE.T
    [J]. NUCLEAR PHYSICS A, 1968, A114 (01) : 1 - +
  • [3] NEUTRON-INDUCED C-12 (N,N')3ALPHA REACTION AT 14.4 MEV IN A KINEMATICALLY COMPLETE EXPERIMENT
    ANTOLKOVIC, B
    DOLENEC, Z
    [J]. NUCLEAR PHYSICS A, 1975, A237 (02) : 235 - 252
  • [4] 3ALPHA DECAY OF 10.84 AND 11.83 MEV STATES OF C-12
    ANTOLKOVIC, B
    HUDOMALJ, J
    [J]. NUCLEAR PHYSICS A, 1975, A237 (02) : 253 - 259
  • [5] THEORY OF ANGULAR CORRELATION OF NUCLEAR RADIATIONS
    BIEDENHARN, LC
    ROSE, ME
    [J]. REVIEWS OF MODERN PHYSICS, 1953, 25 (03) : 729 - 777
  • [6] Excitation function measurements for 12C+12C inelastic scattering channels -: art. no. 034605
    Bremner, CA
    Chappell, SPG
    Rae, WDM
    Boztosun, I
    Freer, M
    Nicoli, MP
    Singer, SM
    Fulton, BR
    Watson, DL
    Greenhalgh, BJ
    Dillon, GK
    Cowin, RL
    [J]. PHYSICAL REVIEW C, 2002, 66 (03): : 346051 - 346057
  • [7] SEARCH FOR HIGH-SPIN COLLECTIVE STATES IN C-12(STAR)-]3-ALPHA
    CAUSSYN, DD
    GENTRY, GL
    LIENDO, JA
    FLETCHER, NR
    MATEJA, JF
    [J]. PHYSICAL REVIEW C, 1991, 43 (01): : 205 - 212
  • [8] High spin resonances in 12C plus 12C scattering
    Chappell, SPG
    Rae, WDM
    Bremner, CA
    Dillon, GK
    Watson, DL
    Greenhalgh, B
    Cowin, RL
    Freer, M
    Singer, SM
    [J]. PHYSICS LETTERS B, 1998, 444 (3-4) : 260 - 266
  • [9] Structure of the Hoyle state in 12C
    Chernykh, M.
    Feldmeier, H.
    Neff, T.
    von Neumann-Cosel, P.
    Richter, A.
    [J]. PHYSICAL REVIEW LETTERS, 2007, 98 (03)
  • [10] Surface charge flow in two-dimensional position sensitive silicon detectors
    Cowin, RL
    Watson, DL
    [J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1997, 399 (2-3) : 365 - 381