Dependence of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">B</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>12</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> excitation energy on its kinetic energy in the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">N</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>14</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> + Ag reaction at <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mfrac><mrow><mi>E</mi></mrow><mrow><mi>A</mi></mrow></mfrac><mo>=</mo><mn>35</mn><mn></mn></math> MeV

F. Deák; A. Kiss; Z. Seres; A. Galonsky; C. K. Gelbke; L. Heilbronn; W. Lynch; T. Murakami; H. Schelin; M. B. Tsang; B. A. Remington; J. Kasagi

doi:10.1103/PhysRevC.39.733

Rapid Communication

Dependence of ${}^{12}B$ excitation energy on its kinetic energy in the ${}^{14}N$ + Ag reaction at $\frac{E}{A} = 35$ MeV

F. Deák, A. Kiss, Z. Seres, A. Galonsky, C. K. Gelbke, L. Heilbronn, W. Lynch, T. Murakami, H. Schelin, M. B. Tsang, B. A. Remington, and J. Kasagi

Phys. Rev. C 39, 733(R) – Published 1 February 1989

Abstract

We observed the 19 keV neutron decay from the 3.388-MeV state of ${}^{12}B$ by measuring ${}^{11}B$ -neutron coincidences in colinear geometry at several angles. The ratio of this yield to the yield of particle-stable ${}^{12}B$ nuclei is a measure of the excitation energy of ${}^{12}B$ fragments produced in the reaction. The extreme kinematic focusing of the 19-keV decay enabled us to obtain the dependence of this ratio on fragment kinetic energy. For ${}^{12}B$ nuclei emitted with kinetic energies $\frac{E}{A} ≲ 15$ MeV the ratio is surprisingly constant; for ${}^{12}B$ nuclei of higher kinetic energy it decreases monotonically.

Received 3 August 1988

DOI:https://doi.org/10.1103/PhysRevC.39.733

Authors & Affiliations

F. Deák and A. Kiss

Department of Atomic Physics, Eötvös University, Pushkin utca 5-7, H-1088 Budapest 8, Hungary

Z. Seres

Central Research Institute for Physics, Hungarian Academy of Sciences, H-1525 Budapest 114, Hungary

A. Galonsky, C. K. Gelbke, L. Heilbronn, W. Lynch, T. Murakami, H. Schelin^*, and M. B. Tsang

National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-1321

B. A. Remington

Lawrence Livermore National Laboratory, Livermore, California 94550

J. Kasagi

Department of Physics, Tokyo Institute of Technology, 2-12-1 Oh-Okayama, Meguro-Ku, Tokyo 152, Japan

^*On leave from Centro Tecnico Aerospacial and FAPESP (State of São Paulo Foundation for Support of Research) CEP 12225 São José Dos Campos, São Paulo, Brazil.

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Vol. 39, Iss. 2 — February 1989

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