Coulomb and nuclear excitations of Zn-70 and Ni-68 at intermediate energy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F21%3A00547002" target="_blank" >RIV/61389005:_____/21:00547002 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevC.104.034318" target="_blank" >https://doi.org/10.1103/PhysRevC.104.034318</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.104.034318" target="_blank" >10.1103/PhysRevC.104.034318</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Coulomb and nuclear excitations of Zn-70 and Ni-68 at intermediate energy

Popis výsledku v původním jazyce

The reduced transition probabilities B(E2, 0(g.s.)(+) -> 2(1)(+), 2(2)(+)) in (70) Zn and the full B(E2, 0(g.s.)(+) -> 2(+)) strength up to S-n = 7.79 MeV in Ni-68 have been determined at the LISE/GANIL facility using the Coulomb-excitation technique at intermediate beam energy on a Pb-208 target. The gamma rays emitted in-flight were detected with an array of 46BaF(2) crystals. The angles of the deflected nuclei were determined in order to disentangle and extract the Coulomb and nuclear contributions to the excitation of the 2(+) states. The measured B(E2, 0(g.s.)(+) -> 2(1)(+)) of 1432(124) e(2) fm(4) for Zn-70 falls in the lower part of the published values which clustered either around 1600 or above 2000 e(2) fm(4), while the B(E2, 0(g.s.)(+) -> 2(1)(+)) of 53(7) e(2) fm(4) agrees very well with the two published values. The relatively low B(E2, 0(g.s.)(+) -> 2(1)(+)) of 301(38) e(2) fm(4) for Ni-68 agrees with previous studies and confirms a local magicity at Z = 28, N = 40. Combining the results of the low-energy spectra of Ni-68 and Zn-70 and their shell-model interpretations, it is interesting to notice that four different shapes (spherical, oblate, prolate, and triaxial) are present. Finally, a summed E2 strength of only about 150 e(2) fm(4) has been found experimentally at high excitation energy, likely due to proton excitations across the Z = 28 gap. The experimental distribution of this high-energy E2 excitation agrees with shell-model calculations, but its strength is about two times weaker.

Název v anglickém jazyce

Coulomb and nuclear excitations of Zn-70 and Ni-68 at intermediate energy

Popis výsledku anglicky

The reduced transition probabilities B(E2, 0(g.s.)(+) -> 2(1)(+), 2(2)(+)) in (70) Zn and the full B(E2, 0(g.s.)(+) -> 2(+)) strength up to S-n = 7.79 MeV in Ni-68 have been determined at the LISE/GANIL facility using the Coulomb-excitation technique at intermediate beam energy on a Pb-208 target. The gamma rays emitted in-flight were detected with an array of 46BaF(2) crystals. The angles of the deflected nuclei were determined in order to disentangle and extract the Coulomb and nuclear contributions to the excitation of the 2(+) states. The measured B(E2, 0(g.s.)(+) -> 2(1)(+)) of 1432(124) e(2) fm(4) for Zn-70 falls in the lower part of the published values which clustered either around 1600 or above 2000 e(2) fm(4), while the B(E2, 0(g.s.)(+) -> 2(1)(+)) of 53(7) e(2) fm(4) agrees very well with the two published values. The relatively low B(E2, 0(g.s.)(+) -> 2(1)(+)) of 301(38) e(2) fm(4) for Ni-68 agrees with previous studies and confirms a local magicity at Z = 28, N = 40. Combining the results of the low-energy spectra of Ni-68 and Zn-70 and their shell-model interpretations, it is interesting to notice that four different shapes (spherical, oblate, prolate, and triaxial) are present. Finally, a summed E2 strength of only about 150 e(2) fm(4) has been found experimentally at high excitation energy, likely due to proton excitations across the Z = 28 gap. The experimental distribution of this high-energy E2 excitation agrees with shell-model calculations, but its strength is about two times weaker.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/LM2018115" target="_blank" >LM2018115: Système de Production d’Ions Radioactifs Accélérés en Ligne - účast České republiky</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review C

ISSN

2469-9985

e-ISSN

2469-9993

Svazek periodika

104

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

034318

Kód UT WoS článku

000704561300001

EID výsledku v databázi Scopus

2-s2.0-85116253583