E1 and M1 γ-strength functions in 144Nd

Voinov, A. V.; Grimes, S. M.

doi:10.1103/PhysRevC.92.064308

Title: E1 and M1 γ-strength functions in ¹⁴⁴Nd

Journal Article · Sun Dec 13 23:00:00 EST 2015 · Physical Review C, Nuclear Physics

DOI: https://doi.org/10.1103/PhysRevC.92.064308 · OSTI ID:1254904

Voinov, A. V. ^[1]; Grimes, S. M. ^[2]

Ohio Univ., Athens, OH (United States); Ohio University
Ohio Univ., Athens, OH (United States)

Both E1 and M1 γ-strength functions below the neutron separation energy were analyzed based on experimental data from ¹⁴³Nd(n,γ)¹⁴⁴Nd and ¹⁴³Nd(n,γα)¹⁴⁰Ce reactions. It is confirmed that the commonly adopted E1 model based on the temperature dependence of the width of the giant dipole resonance works well. The popular M1 strength function due to the spin-flip magnetic resonance located near the neutron binding energy is not capable of reproducing experimental data. As a result, the low-energy enhancement of the M1 strength or the energy-independent model of Weisskopf, both leading to the low-energy strength sizable to E1 one, fit experimental data best.

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Research Organization:: Ohio Univ., Athens, OH (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: FG02-88ER40387; NA0001837; NA0002905

OSTI ID:: 1254904

Journal Information:: Physical Review C, Nuclear Physics, Journal Name: Physical Review C, Nuclear Physics Journal Issue: 6 Vol. 92; ISSN 0556-2813; ISSN PRVCAN

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Examination of the low-energy enhancement of the γ -ray strength function of Fe 56 Jones, M. D.; Macchiavelli, A. O.; Wiedeking, M. Physical Review C, Vol. 97, Issue 2 https://doi.org/10.1103/physrevc.97.024327	journal	February 2018

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Title: E1 and M1 γ-strength functions in ¹⁴⁴Nd