Experimental Research to Confirm the Excitation of Gamov–Teller Resonance in Compound Nucleus 118Sb

• Published in: Physics of atomic nuclei Vol. 80; no. 9; pp. 1539 - 1548
• Main Authors: Generalov, L. N., Karpov, I. A., Vikhlyantsev, O. P., Tumkin, A. D., Fedotov, D. A., Velichko, K. S., Selyankina, S. M.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2017; Springer Nature B.V
• Subjects: Excitation; Interaction of Plasma; Nuclei (nuclear physics); Particle and Nuclear Physics; Particle Beams; Physics; Physics and Astronomy; Proton beams; Proton energy; Quantum numbers; Radiation With Matter; excitation function; compound nucleus; Gamov–Teller resonance
• ISSN: 1063-7788; 1562-692X
• DOI: 10.1134/S1063778817090083

At proton energies of 4–9 MeV, trial experimental investigations were performed to confirm the excitation of Gamov–Teller resonance (GTR) 1
+
in the compound nucleus
118
Sb discovered by B.Ya. Guzhovskiy’s research group in the
117
Sn(
p
,
xn
) reaction at proton energies of 7.2 MeV (the first component is GTR1) and 9.9MeV (the second component is GTR2). The
117
Sn(
p
,
xn
) reaction was used, whose neutrons and background neutrons were registered by an all-wave long counter arranged at an angle of 140° to the direction of the proton beam propagation. Simultaneously, along with the registration of neutrons, elastically and inelastically scattered protons at angles of 20° and 160° were registered. At the proton energy equal to ~7.2 MeV, in the excitation functions for
117
Sn(
p
,
xn
),
117
Sn(
p
,
p
0
), and
117
Sn(
p
,
p
4
)
117
Sn* (1004.5 keV, 3/2
+
), a resonance with a width of ≈1.2 MeV having an energy structure was discovered. Its possible quantum numbers are 1
+
.