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Beta-decay Half Lives beyond $^{54}$Ca: A Systematic Survey of Decay Properties approaching the Neutron Dripline

Fuente: arXiv

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Bibliographische Detailangaben
Hauptverfasser:	Ong, W. -J., Xu, Z. Y., Grzywacz, R., Ravlić, A., Cox, I., Allmond, J. M., King, T. T., Rasco, B. C., Rykaczewski, K. P., Schatz, H., Sherrill, B. M., Tarasov, B., Brown, B. A., Ajayi, S., Arora, H., Ayangeakaa, A. D., Berg, H. C., Berkman, J. M., Bleuel, D. L., Bosmpotinis, K., Carpenter, M. P., Cerizza, G., Chester, A., Christie, J. M., Crawford, H. L., Crider, B. P., Davis, J., Doetsch, A. A., Duarte, J. G., Estrade, A., Fijalkowska, A., Frantzis, C., Fukushima, K., Gaballah, T., Gray, T., Good, E., Haak, K., Hanai, S., Hartley, A. C., Harke, J. T., Hermansen, K., Harris, C., Hausmann, M., Hoff, D. E. M., Hoskins, D., Huffman, J., Jain, R., Karny, M., Kitamura, N., Kolos, K., Kwan, E., Laminack, A., Liddick, S. N., Longfellow, B., Lubna, R. S., Lyons, S., Madurga, M., Mogannam, M., Neupane, S., Nowicki, A., Ogunbeku, T. H., Owens-Fryar, G., Palomino, J. R., Portillo, M., Rajabali, M. M., Richard, A. L., Richardson, I., Ronning, E., Rose, G. E., Ruland, T., Scielzo, N. D., Scriven, D. P., Seweryniak, D., Siegl, K., Singh, M., Smith, M. K., Spyrou, A., Stepaniuk, M., Sweet, A., Tripathi, V., Tsantiri, A., Uthayakumaar, S., Walters, W. B., Watters, S., Wolinska-Cichocka, M., Yokoyama, R.
Format:	Preprint
Veröffentlicht:	2025
Schlagworte:	Nuclear Experiment Nuclear Theory
Online-Zugang:	Acceder al recurso
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_version_	1866911226996457472
author	Ong, W. -J. Xu, Z. Y. Grzywacz, R. Ravlić, A. Cox, I. Allmond, J. M. King, T. T. Rasco, B. C. Rykaczewski, K. P. Schatz, H. Sherrill, B. M. Tarasov, B. Brown, B. A. Ajayi, S. Arora, H. Ayangeakaa, A. D. Berg, H. C. Berkman, J. M. Bleuel, D. L. Bosmpotinis, K. Carpenter, M. P. Cerizza, G. Chester, A. Christie, J. M. Crawford, H. L. Crider, B. P. Davis, J. Doetsch, A. A. Duarte, J. G. Estrade, A. Fijalkowska, A. Frantzis, C. Fukushima, K. Gaballah, T. Gray, T. Good, E. Haak, K. Hanai, S. Hartley, A. C. Harke, J. T. Hermansen, K. Harris, C. Hausmann, M. Hoff, D. E. M. Hoskins, D. Huffman, J. Jain, R. Karny, M. Kitamura, N. Kolos, K. Kwan, E. Laminack, A. Liddick, S. N. Longfellow, B. Lubna, R. S. Lyons, S. Madurga, M. Mogannam, M. Neupane, S. Nowicki, A. Ogunbeku, T. H. Owens-Fryar, G. Palomino, J. R. Portillo, M. Rajabali, M. M. Richard, A. L. Richardson, I. Ronning, E. Rose, G. E. Ruland, T. Scielzo, N. D. Scriven, D. P. Seweryniak, D. Siegl, K. Singh, M. Smith, M. K. Spyrou, A. Stepaniuk, M. Sweet, A. Tripathi, V. Tsantiri, A. Uthayakumaar, S. Walters, W. B. Watters, S. Wolinska-Cichocka, M. Yokoyama, R.
author_facet	Ong, W. -J. Xu, Z. Y. Grzywacz, R. Ravlić, A. Cox, I. Allmond, J. M. King, T. T. Rasco, B. C. Rykaczewski, K. P. Schatz, H. Sherrill, B. M. Tarasov, B. Brown, B. A. Ajayi, S. Arora, H. Ayangeakaa, A. D. Berg, H. C. Berkman, J. M. Bleuel, D. L. Bosmpotinis, K. Carpenter, M. P. Cerizza, G. Chester, A. Christie, J. M. Crawford, H. L. Crider, B. P. Davis, J. Doetsch, A. A. Duarte, J. G. Estrade, A. Fijalkowska, A. Frantzis, C. Fukushima, K. Gaballah, T. Gray, T. Good, E. Haak, K. Hanai, S. Hartley, A. C. Harke, J. T. Hermansen, K. Harris, C. Hausmann, M. Hoff, D. E. M. Hoskins, D. Huffman, J. Jain, R. Karny, M. Kitamura, N. Kolos, K. Kwan, E. Laminack, A. Liddick, S. N. Longfellow, B. Lubna, R. S. Lyons, S. Madurga, M. Mogannam, M. Neupane, S. Nowicki, A. Ogunbeku, T. H. Owens-Fryar, G. Palomino, J. R. Portillo, M. Rajabali, M. M. Richard, A. L. Richardson, I. Ronning, E. Rose, G. E. Ruland, T. Scielzo, N. D. Scriven, D. P. Seweryniak, D. Siegl, K. Singh, M. Smith, M. K. Spyrou, A. Stepaniuk, M. Sweet, A. Tripathi, V. Tsantiri, A. Uthayakumaar, S. Walters, W. B. Watters, S. Wolinska-Cichocka, M. Yokoyama, R.
contents	In an experiment performed at the Facility for Rare Isotope Beams (FRIB) using the FRIB Decay Station initiator (FDSi), 15 new half lives of isotopes near $^{54}$Ca were measured. A new method of extracting lifetimes from experimental data, taking into account the unknown $β$-delayed neutron emission branches of very neutron-rich nuclei, was developed to enable systematic uncertainty analysis. The experiment observed a dramatic change in the half-life systematics for the isotopes with neutron number N =34. Beyond N =34, the decline of nuclear lifetime is much slower, leading to longer than anticipated lifetimes for near-dripline nuclei. State-of-the-art shell-model calculations can explain the experimental results for Z$>$19 nuclei, revealing the imprint of shell effects and the need for modification of single-particle neutron states. The results from a newly developed QRPA model with potential for making global predictions were also tested against the experimental results and good agreement was found.
format	Preprint
id	arxiv_https___arxiv_org_abs_2510_19757
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Beta-decay Half Lives beyond $^{54}$Ca: A Systematic Survey of Decay Properties approaching the Neutron Dripline Ong, W. -J. Xu, Z. Y. Grzywacz, R. Ravlić, A. Cox, I. Allmond, J. M. King, T. T. Rasco, B. C. Rykaczewski, K. P. Schatz, H. Sherrill, B. M. Tarasov, B. Brown, B. A. Ajayi, S. Arora, H. Ayangeakaa, A. D. Berg, H. C. Berkman, J. M. Bleuel, D. L. Bosmpotinis, K. Carpenter, M. P. Cerizza, G. Chester, A. Christie, J. M. Crawford, H. L. Crider, B. P. Davis, J. Doetsch, A. A. Duarte, J. G. Estrade, A. Fijalkowska, A. Frantzis, C. Fukushima, K. Gaballah, T. Gray, T. Good, E. Haak, K. Hanai, S. Hartley, A. C. Harke, J. T. Hermansen, K. Harris, C. Hausmann, M. Hoff, D. E. M. Hoskins, D. Huffman, J. Jain, R. Karny, M. Kitamura, N. Kolos, K. Kwan, E. Laminack, A. Liddick, S. N. Longfellow, B. Lubna, R. S. Lyons, S. Madurga, M. Mogannam, M. Neupane, S. Nowicki, A. Ogunbeku, T. H. Owens-Fryar, G. Palomino, J. R. Portillo, M. Rajabali, M. M. Richard, A. L. Richardson, I. Ronning, E. Rose, G. E. Ruland, T. Scielzo, N. D. Scriven, D. P. Seweryniak, D. Siegl, K. Singh, M. Smith, M. K. Spyrou, A. Stepaniuk, M. Sweet, A. Tripathi, V. Tsantiri, A. Uthayakumaar, S. Walters, W. B. Watters, S. Wolinska-Cichocka, M. Yokoyama, R. Nuclear Experiment Nuclear Theory In an experiment performed at the Facility for Rare Isotope Beams (FRIB) using the FRIB Decay Station initiator (FDSi), 15 new half lives of isotopes near $^{54}$Ca were measured. A new method of extracting lifetimes from experimental data, taking into account the unknown $β$-delayed neutron emission branches of very neutron-rich nuclei, was developed to enable systematic uncertainty analysis. The experiment observed a dramatic change in the half-life systematics for the isotopes with neutron number N =34. Beyond N =34, the decline of nuclear lifetime is much slower, leading to longer than anticipated lifetimes for near-dripline nuclei. State-of-the-art shell-model calculations can explain the experimental results for Z$>$19 nuclei, revealing the imprint of shell effects and the need for modification of single-particle neutron states. The results from a newly developed QRPA model with potential for making global predictions were also tested against the experimental results and good agreement was found.
title	Beta-decay Half Lives beyond $^{54}$Ca: A Systematic Survey of Decay Properties approaching the Neutron Dripline
topic	Nuclear Experiment Nuclear Theory
url	https://arxiv.org/abs/2510.19757