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Part I: Total yield measurements for the ^(21)Ne(α,n)^)(24)Mg reaction. Part II: A study of the ^(12)C(He,p)^(14)N reaction


Mak, Hay Boon (1972) Part I: Total yield measurements for the ^(21)Ne(α,n)^)(24)Mg reaction. Part II: A study of the ^(12)C(He,p)^(14)N reaction. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/MAQD-H937.



The total cross-section for the reaction 21Ne(α, n)24Mg has been measured in the energy range 1.49 Mev ≤ Ecm ≤ 2.6 Mev. The cross-section factor, S(O), for this reaction has been determined, by means of an optical model calculation, to be in the range 1.52 x 1012 mb-Mev to 2.67 x 1012 mb-Mev, for interaction radii in the range 5.0 fm to 6.6 fm. With S(O) ≈ 2 x 1012 mb-Mev, the reaction 21Ne(α, n)24Mg can produce a large enough neutron flux to be a significant astrophysical source of neutrons.


The reaction12C(3He, p)14N has been studied over the energy range 12 Mev ≤ Elab ≤ 18 Mev. Angular distributions of the proton groups leading to the lowest seven levels in 14N were obtained.

Distorted wave calculations, based on two-nucleon transfer theory, were performed, and were found to be reliable for obtaining the value of the orbital angular momentum transferred. The present work shows that such calculations do not yield unambiguous values for the spectroscopic factors.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Barnes, Charles A.
Thesis Committee:
  • Unknown, Unknown
Defense Date:12 November 1971
Funding AgencyGrant Number
Record Number:CaltechTHESIS:05092016-085355645
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9706
Deposited By: Leslie Granillo
Deposited On:11 May 2016 16:51
Last Modified:21 Dec 2019 04:11

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