Restoring the valence-shell stabilization in 140Nd

A projectile Coulomb-excitation experiment was performed at the radioactive-ion beam facility HIE-ISOLDE at CERN to obtain 𝐸⁢2 and 𝑀⁢1 transition matrix elements of
140
Nd
using the multistep Coulomb-excitation code gosia. The absolute 𝑀⁢1 strengths, B⁡(𝑀⁢1;2+
2→2+
1)=0.033⁢(8)⁢𝜇2
N,B⁡(𝑀⁢1;2+
3→2+
1)=0.26+0.11
−0.10⁢𝜇2
N, and B⁡(𝑀⁢1;2+
4→2+
1)<0.04𝜇2
N, identify the 2+
3 state as the main fragment of the one-quadrupole-phonon proton-neutron mixed-symmetry state of
140
Nd
. The degree of 𝐹-spin mixing in
140
Nd
was quantified with the determination of the mixing matrix element 𝑉F−mix<7+13
−7keV.

Authors: Kern, R.; Zidarova, R.; Pietralla, N.; Rainovski, G.; Stegmann, R.; Blazhev, A.; Boukhari, A.; Cederkäll, J.; Cubiss, J. G.; Djongolov, M.; Fransen, C.; Gaffney, L. P.; Gladnishki, K.; Giannopoulos, E.; Hess, H.; Jolie, J.; Karayonchev, V.; Kaya, L.; Keatings, J. M.; Kocheva, D.; Kröll, Th.; Möller, O.; O’Neill, G. G.; Pakarinen, J.; Reiter, P.; Rosiak, D.; Scheck, M.; Snall, J.; Söderström, P.-A.; Spagnoletti, P.; Stoyanova, M.; Thiel, S.; Vogt, A.; Warr, N.; Welker, A.; Werner, V.; Wiederhold, J.; De Witte, H.

Doi: 10.1103/PhysRevC.102.041304

Issue number:

Journal: Phys. Rev. C

Page number: 041304

Published on: 2020-10-16

Year: