ISOMERIC CROSS-SECTION RATIOS AND TOTAL CROSS SECTIONS FOR 59CO(N,2N)58G,MCO, 58NI(N,P)58G,MCO AND 59CO(GAMMA,N)58G,MCO REACTIONS

被引:42
作者
DECOWSKI, P
GROCHULSKI, W
MARCINKOWSKI, A
SIWEK, K
SLEDZINS.I
WILHELMI, Z
机构
[1] University of Warsaw, Institute of Nuclear Research, Warsaw
关键词
Nuclear reactions;
D O I
10.1016/0375-9474(68)90075-4
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 isomeric ratios and excitation functions were measured for the 59Co(n, 2n)58Co reaction in the neutron energy range 12-18 MeV and for the 58Ni(n, p)58Co reaction in the neutron range 2-18 MeV. The isomeric ratio is also presented for the 59Co(γ, n)58Co reaction induced by photons from 30 MeV electron bremsstrahlung. The results are compared with the statistical-model predictions. Use was made of modified nuclear level density formulae based on the superconductivity theory, which account for the pairing and shell effects. In all cases investigated, the calculated isomeric ratios show good agreement with experimental data, whereas the calculated total cross sections do not agree with the measured values. The disagreement may be due to the fact that no account was taken of the gamma emission in competition with the neutron emission from the residual nucleus. © 1968.
引用
收藏
页码:513 / +
页数:1
相关论文
共 52 条
  • [1] AN EXPERIMENTAL TEST OF STATISTICAL THEORY OF NUCLEAR REACTIONS
    ALLAN, DL
    [J]. NUCLEAR PHYSICS, 1961, 24 (02): : 274 - &
  • [2] AVERY CJ, 1952, PHYS REV, V87, P216
  • [3] PHOTONEUTRON CROSS SECTIONS FOR CO NI CU AND GA
    BACIU, G
    BONAZZOLA, GC
    MINETTI, B
    MOLINO, C
    PASQUALINI, L
    PIRAGINO, G
    [J]. NUCLEAR PHYSICS, 1965, 67 (01): : 178 - +
  • [4] LOW-LYING LEVELS IN 50V AND 58CO STUDIED WITH (P,D) REACTION
    BALL, JB
    SWEET, RF
    [J]. PHYSICAL REVIEW, 1965, 140 (4B): : B904 - &
  • [5] BARRY JF, 1962, J NUCL ENERG REACT S, V16, P1215
  • [6] DER SPINABSCHNEIDEPARAMETER FUR EINIGE MITTELSCHWERE KERNE AUS NEUTRONENREAKTIONEN
    BORMANN, M
    DREYER, F
    SEEBECK, U
    VOIGTS, W
    [J]. ZEITSCHRIFT FUR NATURFORSCHUNG PART A-ASTROPHYSIK PHYSIK UND PHYSIKALISCHE CHEMIE, 1966, A 21 (07): : 988 - &
  • [7] MESURE DE QUELQUES SECTIONS EFFICACES (N, ALPHA) DANS LINTERVALLE DES NEUTRONS 12 A 19,6 MEV
    BORMANN, M
    CIERJACKS, S
    LANGKAU, R
    NEUERT, H
    POLLEHN, H
    [J]. JOURNAL DE PHYSIQUE ET LE RADIUM, 1961, 22 (10): : 602 - 604
  • [8] UBER DIE WIRKUNGSQUERSCHNITTE EINIGER N, N ALPHA-REAKTIONEN FUR NEUTRONENENERGIEN ZWISCHEN 12 UND 19 ME V
    BORMANN, M
    NEUERT, H
    CIERJACKS, S
    LANGKAU, R
    [J]. ZEITSCHRIFT FUR PHYSIK, 1962, 166 (05): : 477 - &
  • [9] BORMANN M, EANDCE66
  • [10] INVESTIGATION OF SHORT-LIVED ISOMERIC STATES WITH HALF-LIVES IN MUS AND MS REGION
    BRANDI, K
    ENGELMANN, R
    HEPP, V
    KLUGE, E
    KREHBIEL, H
    MEYERBER.U
    [J]. NUCLEAR PHYSICS, 1964, 59 (01): : 33 - +