Correlations between the alpha particles and ejectiles in the 208 MeV N14 on Nb93 reaction at three different ejectile angles

T. Fukuda, M. Ishihara, M. Tanaka, H. Ogata, I. Miura, M. Inoue, T. Shimoda, K. Katori, and S. Nakayama
Phys. Rev. C 27, 2029 – Published 1 May 1983
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Abstract

The in plane correlations between alpha particles and various ejectiles were investigated in the reaction of 208 MeV N14 on Nb93 at θHI=+22°, +50°, and +80°. There were three sources of coincident alpha particles: (i) the sequential alpha decay of the excited ejectiles, (ii) the equilibrium alpha emission from the targetlike fragments, and (iii) the nonequilibrium process. Process (i) contributed mainly to the cross sections with the angular range of θα close to θHI. Process (ii) contributed to the lowest part of the alpha energy spectra irrespectively of θHI and θα. The remaining part was ascribed to process (iii). For this process the differential coincidence cross section of the lower energy part of the alpha particles was approximately factorized as d4σdΩHIdΩαdEHIdEα=K(d2σdΩHIdEHI)singles(d2σdΩαdEα)singles with K0.4/b, whereas the higher energy part of the alpha particles emitted at the forward angles had a tendency to coincide weakly with the ejectiles emitted at the backward angles (θHI=+50° and +80°) as compared to the lower energy part of the alpha particles.

NUCLEAR REACTIONS Nb93(N14, HIα), E=208 MeV, θHI=22°, 50°, 80°; measured two-dimensional H—α coincident energy and angular correlations; deduced reaction mechanisms.

  • Received 12 November 1982

DOI:https://doi.org/10.1103/PhysRevC.27.2029

©1983 American Physical Society

Authors & Affiliations

T. Fukuda

  • Department of Physics, Osaka University, Toyonaka, Osaka 560, Japan

M. Ishihara

  • Institute of Physical and Chemical Research, Wako-Shi, Saitama 351, Japan

M. Tanaka

  • Kobe Tokiwa Junior College, Nagata, Kobe 653, Japan

H. Ogata, I. Miura, and M. Inoue

  • Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567, Japan

T. Shimoda and K. Katori

  • Laboratory of Nuclear Studies, Osaka University, Toyonaka, Osaka 560, Japan

S. Nakayama

  • College of General Education, Tokushima University, Tokushima 770, Japan

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Issue

Vol. 27, Iss. 5 — May 1983

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