Decay properties and lifetimes of states in 144Sm from (n, n'γ) reaction studies

R. A. Gatenby; E. L. Johnson; E. M. Baum; S. W. Yates; D. Wang; J. R. Vanhoy; M. T. McEllistrem; T. Belgya; B. Fazekas; G. Molnár

doi:10.1016/0375-9474(93)90038-Y

Decay properties and lifetimes of states in ¹⁴⁴Sm from (n, n'γ) reaction studies

R. A. Gatenby, E. L. Johnson, E. M. Baum, S. W. Yates, D. Wang, J. R. Vanhoy, M. T. McEllistrem, T. Belgya, B. Fazekas, G. Molnár

Chemistry

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

An extensive investigation of ¹⁴⁴Sm has been carried out with the (n, n'γ) reaction. Gamma-ray excitation function and angular-distribution measurements were performed at neutron energies up to 4.3 MeV. Many new levels have been established and characterized, and the assignments of several previously known states have been clarified. Level lifetimes were measured following the inelastic neutron-scattering reaction by observing the Doppler shifts of de-exciting γ-rays, and reduced transition rates have been inferred. Recent shell-model calculations were found to describe the ¹⁴⁴Sm level scheme very well up to 3.2 MeV. A large number of relatively fast E1 transitions were observed.

Original language	English
Pages (from-to)	633-663
Number of pages	31
Journal	Nuclear Physics, Section A
Volume	560
Issue number	2
DOIs	https://doi.org/10.1016/0375-9474(93)90038-Y
State	Published - Jul 19 1993

Keywords

NUCLEAR REACTIONS

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/0375-9474(93)90038-Y

Cite this

@article{55d4b90cfa6e411f97c5cf839b51848d,

title = "Decay properties and lifetimes of states in 144Sm from (n, n'γ) reaction studies",

abstract = "An extensive investigation of 144Sm has been carried out with the (n, n'γ) reaction. Gamma-ray excitation function and angular-distribution measurements were performed at neutron energies up to 4.3 MeV. Many new levels have been established and characterized, and the assignments of several previously known states have been clarified. Level lifetimes were measured following the inelastic neutron-scattering reaction by observing the Doppler shifts of de-exciting γ-rays, and reduced transition rates have been inferred. Recent shell-model calculations were found to describe the 144Sm level scheme very well up to 3.2 MeV. A large number of relatively fast E1 transitions were observed.",

keywords = "NUCLEAR REACTIONS",

author = "Gatenby, {R. A.} and Johnson, {E. L.} and Baum, {E. M.} and Yates, {S. W.} and D. Wang and Vanhoy, {J. R.} and McEllistrem, {M. T.} and T. Belgya and B. Fazekas and G. Moln{\'a}r",

year = "1993",

month = jul,

day = "19",

doi = "10.1016/0375-9474(93)90038-Y",

language = "English",

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TY - JOUR

T1 - Decay properties and lifetimes of states in 144Sm from (n, n'γ) reaction studies

AU - Gatenby, R. A.

AU - Johnson, E. L.

AU - Baum, E. M.

AU - Yates, S. W.

AU - Wang, D.

AU - Vanhoy, J. R.

AU - McEllistrem, M. T.

AU - Belgya, T.

AU - Fazekas, B.

AU - Molnár, G.

PY - 1993/7/19

Y1 - 1993/7/19

N2 - An extensive investigation of 144Sm has been carried out with the (n, n'γ) reaction. Gamma-ray excitation function and angular-distribution measurements were performed at neutron energies up to 4.3 MeV. Many new levels have been established and characterized, and the assignments of several previously known states have been clarified. Level lifetimes were measured following the inelastic neutron-scattering reaction by observing the Doppler shifts of de-exciting γ-rays, and reduced transition rates have been inferred. Recent shell-model calculations were found to describe the 144Sm level scheme very well up to 3.2 MeV. A large number of relatively fast E1 transitions were observed.

AB - An extensive investigation of 144Sm has been carried out with the (n, n'γ) reaction. Gamma-ray excitation function and angular-distribution measurements were performed at neutron energies up to 4.3 MeV. Many new levels have been established and characterized, and the assignments of several previously known states have been clarified. Level lifetimes were measured following the inelastic neutron-scattering reaction by observing the Doppler shifts of de-exciting γ-rays, and reduced transition rates have been inferred. Recent shell-model calculations were found to describe the 144Sm level scheme very well up to 3.2 MeV. A large number of relatively fast E1 transitions were observed.

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