HOME    |    BROWSE    |    SEARCH    |    SUBSCRIPTION   |    SUBMISSION    |    REGISTRATION

Quick Search:
Author: Title/Abstract: Vol./No: Page:
PTP Online Top > Volume 53 (1975) > Number 4
| Next Article >

Prog. Theor. Phys. Vol. 53 No. 4 (1975) pp. 1006-1021

[ Full Text PDF : FREE ACCESS (1459K) ]

Backward Angle Anomaly in Alpha-Nucleus Scattering and Parity-Dependent Optical Model

Yosio Kondō, Sinobu Nagata, Shigeo Ohkubo and Osamu Tanimura*

Department of Physics, Kyoto University, Kyoto
*Department of Physics and Atomic Energy Research Institute, Nihon University, Tokyo

(Received September 13, 1974)

Abstract:

An extended optical potential model is proposed, which has a parity-dependent part in the nuclear surface region. Backward angle anomaly in the differential cross section appearing in the α-particle scattering on the nuclei in the calcium region is analyzed systematically by this model. It is shown that the scattering amplitudes of sufrace-grazing partial waves superposed by the parity-dependent potential are summed up coherently at backward angles to give the backward rising of the differential cross section. The α-Ca and -Ar scattering with an incident energy near 20 ∼30 MeV are analyzed and a fairly good fit is obtained. The gross behavior of a broad peak in the excitation function at an extreme back angle is reproduced with an energy dependence of the parity-dependent part and it is shown that this broad peak is brought about by a coherent contribution of the additional amplitudes in some surface partial waves.


URL : http://ptp.ipap.jp/link?PTP/53/1006/
DOI : 10.1143/PTP.53.1006

[ Full Text PDF : FREE ACCESS (1459K) ] Citation:

References:

  1. a)A. Budzanowski, K. Grotowski, S. Micek, H. Niewodniczański, J. Śli\.z, A. Strzałkowski and H. Wojciechowski, Phys. Lett. 11 (1964), 74[CrossRef].
    b) A. Budzanowski, K. Grotowski, L. Jarczyk, Mrs. B. Łazarska, S. Micek, H. Niewodniczański, A. Strzałkowski and Mrs. Z. Wróbel, Phys. Lett. 16 (1965), 135[CrossRef].
  2. a) J. F. Morgan and R. K. Hobbie, Phys. Rev. C 1 (1970), 155[APS].
    b) A. A. Cowley and G. Heymann, Nucl. Phys. A 146 (1970), 465[CrossRef].
    c) M. Takeda, S. Kato and T. Yamazaki, J. Phys. Soc. Jpn. 30 (1971), 56[JPSJ]; ibid. 31 (1971), 625[JPSJ].
  3. R. Stock, G. Gaul, R. Santo, M. Bernas, B. Harvey, D. Hendrie, J. Mahoney, J. Sherman, J. Steyaert and M. Zisman, Phys. Rev. C 6 (1972), 1226[APS].
  4. G. Gaul, H. Lüdecke, R. Santo, H. Schmeing and R. Stock, Nucl. Phys. A 137 (1969), 177[CrossRef].
  5. a) E. Labie, J. Lega and P. C. Macq, Nucl. Phys. A 135 (1969), 145[CrossRef].
    b) K. W. McVoy, Phys. Rev. C 3 (1971), 1104[APS].
  6. C. R. Gruhn and N. S. Wall, Nucl. Phys. 81 (1966), 161[Elsevier].
  7. a) T. Honda, Y. Kudo and H. Ui, Nucl. Phys. 44 (1964), 472[CrossRef].
    b) J. V. Noble and H. T. Coelho, Phys. Rev. C 3 (1971), 1840[APS].
  8. D. Agassi and N. S. Wall, Phys. Rev. C 7 (1973), 1368[APS].
  9. E. Boridy, Phys. Lett. B 48 (1974), 413[CrossRef].
  10. K. A. Eberhard, Phys. Lett. B 33 (1970), 343[CrossRef].
  11. J. Hiura and R. Tamagaki, Prog. Theor. Phys. Suppl. No. 52 (1972), 25[PTP]. See also references therein.
  12. a) H. Kanada, S. Nagata, S. Otsuki and Y. Sumi, Prog. Theor. Phys. 30 (1963), 475[PTP].
    b) R. E. Brown and Y. C. Tang, Phys. Rev. 176 (1968), 1235[APS].
    c) Y. C. Tang and R. E. Brown, Phys. Rev. C 4 (1971), 1979[APS].
    d) G. W. Greenless and Y. C. Tang, Phys. Lett. B 34 (1971), 359[CrossRef].
  13. M. Gell-Mann and M. L. Goldberger, Phys. Rev. 91 (1953), 398[APS].
  14. F. Perey and B. Buck, Nucl. Phys. 32 (1962), 353[CrossRef].
  15. R. Ceuleneer and F. Michel, Phys. Lett. B 43 (1973), 365[CrossRef].
  16. S. Saito, Prog. Theor. Phys. 41 (1969), 705[PTP].

Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 55 No. 6 (1976) pp. 1782-1797 :
    Double-Layer Model Analysis of Elastic Scattering of Complex Nuclei
    Masahisa Ohta
  2. Progress of Theoretical Physics Vol. 57 No. 1 (1977) pp. 82-95 :
    Backward Angle Anomaly in Alpha+16O Scattering and Alpha-Cluster States in 20Ne
    Shigeo Ohkubo, Yosio Kondō and Sinobu Nagata
  3. Progress of Theoretical Physics Vol. 57 No. 2 (1977) pp. 680-683 :
    Parity-Dependent Optical Potential Model Calculation of Elastic Scattering of 16O by 19F
    Jun Schimizu, Kazuo Fujii and Kiyohiko Takimoto
  4. Progress of Theoretical Physics Vol. 66 No. 2 (1981) pp. 729-733 :
    Parity Dependent Potential in Polarized Triton Scattering
    Shigeo Ohkubo
  5. Progress of Theoretical Physics Vol. 67 No. 4 (1982) pp. 1236-1239 :
    Equivalent Local Potentials for RGM Non-Local Potentials of the Systems of 0s-Shell-Nucleus+40Ca
    Kaoru Aoki and Hisashi Horiuchi
  6. Progress of Theoretical Physics Vol. 69 No. 3 (1983) pp. 857-885 :
    Study of Local Inter-Nucleus Potential on the Basis of the Resonating Group Method. III
    Kaoru Aoki and Hisashi Horiuchi
  7. Progress of Theoretical Physics Supplement No.62 (1977) pp. 11-89 :
    Chapter II. Theory of Resonating Group Method and Generator Coordinate Method, and Orthogonality Condition Model
    Sakae Saito
  8. Progress of Theoretical Physics Supplement No.132 (1998) pp. 7-72 :
    Chapter 2. Local Potential Approach to the Alpha-Nucleus Interaction and Alpha-Cluster Structure in Nuclei
    Francis Michel, Shigeo Ohkubo and Guy Reidemeister

[PTP HOME] [BROWSE] [SEARCH] [SUBSCRIPTION] [SUBMISSION] [REGISTRATION]

Copyright © Progress of Theoretical Physics 2013 All rights reserved.