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PreprintarXiv licencearXiv

Excited states of 148Nd studied via the 150Nd(p,t)148Nd reaction and the observation of possible low-spin two-phonon octupole states at N=88

  • A. L. Conley
  • M. Spieker
  • R. Aggarwal
  • L. T. Baby
  • J. Davis
  • J. Esparza
  • I. Hay
  • B. Kelly
  • T. Kirk
  • M. I. Khawaja
  • R. Mahajan
  • M. Mestayer
6 more authors
  • A. B. Morelock
  • A. Peters
  • A. M. Ring
  • J. Sheridan
  • V. Sitaraman
  • T. Stuck
Open at sourcePDFDOICite

Abstract

We report new data from a 150Nd(p,t)148Nd experiment performed at the John D. Fox Accelerator Laboratory of Florida State University. In total, 54 excited states of 148Nd were observed up to an excitation energy of 3500 keV. In this work, we focus on 0+ states and their band members. In contrast to previous work, the 0+3 band is proposed as the candidate for the two-phonon octupole vibrational band. Supporting spdf IBM-1 calculations are presented. To test the robustness of the IBM calculations, several observables were interrogated and are discussed in this publication. In addition, we make the case that neither the 0+2 nor the 0+3 states of the other N=88 isotones are likely good candidates for two-phonon octupole states. Based on our new data for 148Nd, we propose candidates in 150Sm and 152Gd. Using available γ-decay data for states with moderate spins in the yrast sequence and a comparison to IBM calculations, we also show how the staggering of the $B(E1)/B(E2)$ ratios in the yrast sequence can possibly be used to probe the appearance of bands with multiple octupole phonons.

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Cite

BibTeXRIS
BibTeX
@misc{conley2026excited,
  title = {{Excited states of $^148$Nd studied via the $^150$Nd$(p,t)^148$Nd reaction and the observation of possible low-spin two-phonon octupole states at $N=88$}},
  author = {A. L. Conley and M. Spieker and R. Aggarwal and L. T. Baby and J. Davis and J. Esparza and I. Hay and B. Kelly and T. Kirk and M. I. Khawaja and R. Mahajan and M. Mestayer and A. B. Morelock and A. Peters and A. M. Ring and J. Sheridan and V. Sitaraman and T. Stuck},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.12101},
  eprint = {2608.12101},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.12101},
}
RIS
TY  - UNPB
TI  - Excited states of ^148Nd studied via the ^150Nd(p,t)^148Nd reaction and the observation of possible low-spin two-phonon octupole states at N=88
AU  - A. L. Conley
AU  - M. Spieker
AU  - R. Aggarwal
AU  - L. T. Baby
AU  - J. Davis
AU  - J. Esparza
AU  - I. Hay
AU  - B. Kelly
AU  - T. Kirk
AU  - M. I. Khawaja
AU  - R. Mahajan
AU  - M. Mestayer
AU  - A. B. Morelock
AU  - A. Peters
AU  - A. M. Ring
AU  - J. Sheridan
AU  - V. Sitaraman
AU  - T. Stuck
PY  - 2026
DA  - 2026/08/12
PB  - arXiv
DO  - 10.48550/arxiv.2608.12101
UR  - https://arxiv.org/abs/2608.12101
AB  - We report new data from a ^150Nd(p,t)^148Nd experiment performed at the John D. Fox Accelerator Laboratory of Florida State University. In total, 54 excited states of ^148Nd were observed up to an excitation energy of 3500 keV. In this work, we focus on 0^+ states and their band members. In contrast to previous work, the 0^+_3 band is proposed as the candidate for the two-phonon octupole vibrational band. Supporting spdf IBM-1 calculations are presented. To test the robustness of the IBM calculations, several observables were interrogated and are discussed in this publication. In addition, we make the case that neither the 0^+_2 nor the 0^+_3 states of the other N=88 isotones are likely good candidates for two-phonon octupole states. Based on our new data for ^148Nd, we propose candidates in ^150Sm and ^152Gd. Using available γ-decay data for states with moderate spins in the yrast sequence and a comparison to IBM calculations, we also show how the staggering of the $B(E1)/B(E2)$ ratios in the yrast sequence can possibly be used to probe the appearance of bands with multiple octupole phonons.
ER  -