Measurement of the He-4(gamma,n) reaction from 23 < E-gamma < 70 MeV

Nilsson, B.; Adler, J.; Andersson, B.; Annand, J.; AKKURT, İskender; Boland, M.; Crawford, G.; Fissum, K.; Hansen, K.; Harty, P.; Ireland, D.; Isaksson, L.; Karlsson, M.; Lundin, M.; McGeorge, J.; Miller, G.; Ruijter, H.; Sandell, A.; Schroder, B.; Sims, D.; Watts, D.

doi:10.1103/physrevc.75.014007

Measurement of the He-4(gamma,n) reaction from 23 < E-gamma < 70 MeV

Nilsson B., Adler J. -., Andersson B. -., Annand J. R. M., AKKURT İ., Boland M. J., ...Daha Fazla

PHYSICAL REVIEW C, cilt.75, sa.1, 2007 (SCI-Expanded, Scopus)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 75 Sayı: 1
Basım Tarihi: 2007
Doi Numarası: 10.1103/physrevc.75.014007
Dergi Adı: PHYSICAL REVIEW C
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Süleyman Demirel Üniversitesi Adresli: Evet

Özet

A comprehensive set of He-4(gamma,n) absolute cross-section measurements was performed at MAX-lab in Lund, Sweden. Tagged photons from 23 < E-gamma < 70 MeV were directed toward a liquid He-4 target, and neutrons were identified using pulse-shape discrimination and the time-of-flight technique in two liquid-scintillator detector arrays. Seven-point angular distributions have been measured for 14 photon energies. The results have been subjected to complementary transition-coefficient and Legendre-coefficient analyses. The results are also compared to experimental data measured at comparable photon energies as well as recoil-corrected continuum shell-model, resonating group method, and effective interaction hyperspherical-harmonic expansion calculations. For photon energies below 29 MeV, the angle-integrated data are significantly larger than the values recommended by Calarco, Berman, and Donnelly in 1983.