Thermal neutron capture cross sections and neutron separation energies for 23 Na(n, γ)

R. B. Firestone, Zs Revay, T. Belgya

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Prompt thermal neutron capture γ-ray cross sections σγ were measured for the 23Na(n,γ) reaction with guided cold neutron beams at the Budapest Reactor. The 24Na γ-ray cross sections were internally standardized with a stoichiometric NaCl target by using standard 35Cl(n,γ)36Cl γ-ray cross sections. Transitions were assigned to levels in 24Na based primarily upon the known nuclear structure information from the literature, producing a nearly complete neutron capture decay scheme. The total radiative thermal neutron cross section σ0 was determined from the sum of prompt γ-ray cross section populating the ground state as 0.540 (3) b, and from the activation γ-ray cross sections for the decay of 24Na as 0.542 (3) b. The isomer cross section σ0 (23Nam, t1/2=20.20ms)=0.501(3) b and the 24Na neutron separation energy Sn=6959.352(18) keV were also determined in these experiments. New level spins and parities were proposed on the basis of new transition assignments and the systematics of reduced transition probabilities for the primary γ rays.

Original languageEnglish
Article number014617
JournalPhysical Review C - Nuclear Physics
Volume89
Issue number1
DOIs
Publication statusPublished - Jan 30 2014

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thermal neutrons
absorption cross sections
rays
neutrons
cross sections
energy
neutron cross sections
cold neutrons
neutron beams
decay
nuclear structure
transition probabilities
parity
isomers
reactors
activation
ground state

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Thermal neutron capture cross sections and neutron separation energies for 23 Na(n, γ). / Firestone, R. B.; Revay, Zs; Belgya, T.

In: Physical Review C - Nuclear Physics, Vol. 89, No. 1, 014617, 30.01.2014.

Research output: Contribution to journalArticle

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