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Two-deuteron photodisintegration of 4He at Eγ=150-250 MeV

Publication ,  Journal Article
Rice, BJ; Canon, RS; Wulf, EA; Weller, HR; Keeter, K; Kolb, NR; Mueller, C; Pywell, RE; Retzlaff, GA; Skopik, DM; Feldman, G
Published in: Physical Review C - Nuclear Physics
January 1, 2000

We have performed a measurement of the cross section for the 4He(γ,dd) reaction with photon energies between 150 and 250 MeV. Both reaction particles were detected in coincidence. We obtained absolute cross sections at six angles and two energy bins (150-190 MeV and 190-250 MeV). A Legendre polynomial fit to the angular distribution shows a sin2 θ distribution which suggests the isospin-forbidden E1 transition. However, a transition matrix element (TME) analysis using only strictly allowed transitions shows that the angular distribution can be described by just two TMEs: E2 s- and d-wave absorption on the D state of 4He. We performed an inverse direct-capture calculation in order to determine if the D state could contribute to such a high degree to the cross section. This calculation indicates that 90% of the cross section arises from absorption on the D state but fails to reproduce the observed sin2 θ angular distribution.

Duke Scholars

Published In

Physical Review C - Nuclear Physics

EISSN

1089-490X

ISSN

0556-2813

Publication Date

January 1, 2000

Volume

61

Issue

6

Start / End Page

646121 / 646128

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

Citation

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Rice, B. J., Canon, R. S., Wulf, E. A., Weller, H. R., Keeter, K., Kolb, N. R., … Feldman, G. (2000). Two-deuteron photodisintegration of 4He at Eγ=150-250 MeV. Physical Review C - Nuclear Physics, 61(6), 646121–646128.
Rice, B. J., R. S. Canon, E. A. Wulf, H. R. Weller, K. Keeter, N. R. Kolb, C. Mueller, et al. “Two-deuteron photodisintegration of 4He at Eγ=150-250 MeV.” Physical Review C - Nuclear Physics 61, no. 6 (January 1, 2000): 646121–28.
Rice BJ, Canon RS, Wulf EA, Weller HR, Keeter K, Kolb NR, et al. Two-deuteron photodisintegration of 4He at Eγ=150-250 MeV. Physical Review C - Nuclear Physics. 2000 Jan 1;61(6):646121–8.
Rice, B. J., et al. “Two-deuteron photodisintegration of 4He at Eγ=150-250 MeV.” Physical Review C - Nuclear Physics, vol. 61, no. 6, Jan. 2000, pp. 646121–28.
Rice BJ, Canon RS, Wulf EA, Weller HR, Keeter K, Kolb NR, Mueller C, Pywell RE, Retzlaff GA, Skopik DM, Feldman G. Two-deuteron photodisintegration of 4He at Eγ=150-250 MeV. Physical Review C - Nuclear Physics. 2000 Jan 1;61(6):646121–646128.

Published In

Physical Review C - Nuclear Physics

EISSN

1089-490X

ISSN

0556-2813

Publication Date

January 1, 2000

Volume

61

Issue

6

Start / End Page

646121 / 646128

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics