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Intruder structures in $^{32}$Si and $^{29}$Al

Fuente: arXiv

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Bibliographic Details
Main Authors:	Williams, J., Hackman, G., Starosta, K., Lubna, R. S., Choudhary, Priyanka, Sahoo, Subhrajit, Srivastava, P. C., Andreoiu, C., Annen, D., Asch, H., Badanage, M. D. H. K. G., Ball, G. C., Beuschlein, M., Bidaman, H., Bildstein, V., Coleman, R. J., Garnsworthy, A. B., Greaves, B., Leckenby, G., Karayonchev, V., Martin, M. S., Natzke, C., Petrache, C. M., Radich, A., Raleigh-Smith, E., Rhodes, D., Russell, R., Satrazani, M., Spagnoletti, P., Svensson, C. E., Tam, D., Wu, F., Yates, D., Yu, Z.
Format:	Preprint
Published:	2025
Subjects:	Nuclear Experiment
Online Access:	Acceder al recurso
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_version_	1866913915526447104
author	Williams, J. Hackman, G. Starosta, K. Lubna, R. S. Choudhary, Priyanka Sahoo, Subhrajit Srivastava, P. C. Andreoiu, C. Annen, D. Asch, H. Badanage, M. D. H. K. G. Ball, G. C. Beuschlein, M. Bidaman, H. Bildstein, V. Coleman, R. J. Garnsworthy, A. B. Greaves, B. Leckenby, G. Karayonchev, V. Martin, M. S. Natzke, C. Petrache, C. M. Radich, A. Raleigh-Smith, E. Rhodes, D. Russell, R. Satrazani, M. Spagnoletti, P. Svensson, C. E. Tam, D. Wu, F. Yates, D. Yu, Z.
author_facet	Williams, J. Hackman, G. Starosta, K. Lubna, R. S. Choudhary, Priyanka Sahoo, Subhrajit Srivastava, P. C. Andreoiu, C. Annen, D. Asch, H. Badanage, M. D. H. K. G. Ball, G. C. Beuschlein, M. Bidaman, H. Bildstein, V. Coleman, R. J. Garnsworthy, A. B. Greaves, B. Leckenby, G. Karayonchev, V. Martin, M. S. Natzke, C. Petrache, C. M. Radich, A. Raleigh-Smith, E. Rhodes, D. Russell, R. Satrazani, M. Spagnoletti, P. Svensson, C. E. Tam, D. Wu, F. Yates, D. Yu, Z.
contents	We have studied $^{32}$Si and $^{29}$Al using $^{12}$C($^{22}$Ne,2p) and $^{12}$C($^{22}$Ne,$α$p) fusion-evaporation reactions. In both cases, we observed significant population of high-spin structures distinct from the ground-state yrast bands. In $^{32}$Si, most of the high-energy states feed into a $J^π = 5^-$ nanosecond isomer. In $^{29}$Al, we identified a rotor-like negative-parity band with a $J^π = 7/2^-$ band-head. Doppler shift lifetime measurements were performed for all observed states. These results were compared to shell model calculations and interpreted in terms of proton and neutron cross-shell excitation.
format	Preprint
id	arxiv_https___arxiv_org_abs_2506_22357
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Intruder structures in $^{32}$Si and $^{29}$Al Williams, J. Hackman, G. Starosta, K. Lubna, R. S. Choudhary, Priyanka Sahoo, Subhrajit Srivastava, P. C. Andreoiu, C. Annen, D. Asch, H. Badanage, M. D. H. K. G. Ball, G. C. Beuschlein, M. Bidaman, H. Bildstein, V. Coleman, R. J. Garnsworthy, A. B. Greaves, B. Leckenby, G. Karayonchev, V. Martin, M. S. Natzke, C. Petrache, C. M. Radich, A. Raleigh-Smith, E. Rhodes, D. Russell, R. Satrazani, M. Spagnoletti, P. Svensson, C. E. Tam, D. Wu, F. Yates, D. Yu, Z. Nuclear Experiment We have studied $^{32}$Si and $^{29}$Al using $^{12}$C($^{22}$Ne,2p) and $^{12}$C($^{22}$Ne,$α$p) fusion-evaporation reactions. In both cases, we observed significant population of high-spin structures distinct from the ground-state yrast bands. In $^{32}$Si, most of the high-energy states feed into a $J^π = 5^-$ nanosecond isomer. In $^{29}$Al, we identified a rotor-like negative-parity band with a $J^π = 7/2^-$ band-head. Doppler shift lifetime measurements were performed for all observed states. These results were compared to shell model calculations and interpreted in terms of proton and neutron cross-shell excitation.
title	Intruder structures in $^{32}$Si and $^{29}$Al
topic	Nuclear Experiment
url	https://arxiv.org/abs/2506.22357