by Berry, T. A., Podolyák, Zs., Carroll, R. J., Lică, R., Grawe, H., Timofeyuk, N. K., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Creswell, J., Fahlander, C., Fraile, L. M., Fynbo, H. O. U., Gelletly, W., Gerst, R. -B., Górska, M., Gredley, A., Greenlees, P., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kurcewicz, J., Kuti, I., Lalkovski, S., Lazarus, I., Lund, M., Madurga, M., Mărginean, N., Mărginean, R., Marroquin, I., Mihai, C., Mihai, R. E., Nácher, E., Nae, S., Negret, A., Niţă, C., Page, R. D., Pascu, S., Patel, Z., Perea, A., Pucknell, V., Rahkila, P., Rapisarda, E., Regan, P. H., Rotaru, F., Shand, C. M., Simpson, E. C., Sotty, Ch., Stegemann, S., Stora, T., Tengblad, O., Turturica, A., Van Duppen, P., Vedia, V., Wadsworth, R., Walker, P. M., Warr, N., Wearing, F. and De Witte, H.
Abstract:
Gamow-Teller β decay is forbidden if the number of nodes in the radial wave functions of the initial and final states is different. This Δn=0 requirement plays a major role in the β decay of heavy neutron-rich nuclei, affecting the nucleosynthesis through the increased half-lives of nuclei on the astrophysical r-process pathway below both Z=50 (for Ntextgreater82) and Z=82 (for Ntextgreater126). The level of forbiddenness of the Δn=1ν1g9/2→π0g7/2 transition has been investigated from the β− decay of the ground state of 207Hg into the single-proton-hole nucleus 207Tl in an experiment at the ISOLDE Decay Station. From statistical observational limits on possible γ-ray transitions depopulating the π0g7/2−1 state in 207Tl, an upper limit of 3.9×10−3% was obtained for the probability of this decay, corresponding to logfttextgreater8.8 within a 95% confidence limit. This is the most stringent test of the Δn=0 selection rule to date.
Reference:
Investigation of the Δn = 0 selection rule in Gamow-Teller transitions: The β-decay of 207Hg (Berry, T. A., Podolyák, Zs., Carroll, R. J., Lică, R., Grawe, H., Timofeyuk, N. K., Alexander, T., Andreyev, A. N., Ansari, S., Borge, M. J. G., Creswell, J., Fahlander, C., Fraile, L. M., Fynbo, H. O. U., Gelletly, W., Gerst, R. -B., Górska, M., Gredley, A., Greenlees, P., Harkness-Brennan, L. J., Huyse, M., Judge, S. M., Judson, D. S., Konki, J., Kurcewicz, J., Kuti, I., Lalkovski, S., Lazarus, I., Lund, M., Madurga, M., Mărginean, N., Mărginean, R., Marroquin, I., Mihai, C., Mihai, R. E., Nácher, E., Nae, S., Negret, A., Niţă, C., Page, R. D., Pascu, S., Patel, Z., Perea, A., Pucknell, V., Rahkila, P., Rapisarda, E., Regan, P. H., Rotaru, F., Shand, C. M., Simpson, E. C., Sotty, Ch., Stegemann, S., Stora, T., Tengblad, O., Turturica, A., Van Duppen, P., Vedia, V., Wadsworth, R., Walker, P. M., Warr, N., Wearing, F. and De Witte, H.), In Physics Letters B, volume 793, 2019.
Bibtex Entry:
@article{berry_investigation_2019,
title = {Investigation of the Δn = 0 selection rule in {Gamow}-{Teller} transitions: {The} β-decay of {207Hg}},
volume = {793},
issn = {0370-2693},
shorttitle = {Investigation of the Δn = 0 selection rule in {Gamow}-{Teller} transitions},
url = {https://www.sciencedirect.com/science/article/pii/S0370269319302722},
doi = {10.1016/j.physletb.2019.04.039},
abstract = {Gamow-Teller β decay is forbidden if the number of nodes in the radial wave functions of the initial and final states is different. This Δn=0 requirement plays a major role in the β decay of heavy neutron-rich nuclei, affecting the nucleosynthesis through the increased half-lives of nuclei on the astrophysical r-process pathway below both Z=50 (for N{textgreater}82) and Z=82 (for N{textgreater}126). The level of forbiddenness of the Δn=1ν1g9/2→π0g7/2 transition has been investigated from the β− decay of the ground state of 207Hg into the single-proton-hole nucleus 207Tl in an experiment at the ISOLDE Decay Station. From statistical observational limits on possible γ-ray transitions depopulating the π0g7/2−1 state in 207Tl, an upper limit of 3.9×10−3% was obtained for the probability of this decay, corresponding to logft{textgreater}8.8 within a 95% confidence limit. This is the most stringent test of the Δn=0 selection rule to date.},
language = {en},
urldate = {2021-06-09},
journal = {Physics Letters B},
author = {Berry, T. A. and Podolyák, Zs. and Carroll, R. J. and Lică, R. and Grawe, H. and Timofeyuk, N. K. and Alexander, T. and Andreyev, A. N. and Ansari, S. and Borge, M. J. G. and Creswell, J. and Fahlander, C. and Fraile, L. M. and Fynbo, H. O. U. and Gelletly, W. and Gerst, R. -B. and Górska, M. and Gredley, A. and Greenlees, P. and Harkness-Brennan, L. J. and Huyse, M. and Judge, S. M. and Judson, D. S. and Konki, J. and Kurcewicz, J. and Kuti, I. and Lalkovski, S. and Lazarus, I. and Lund, M. and Madurga, M. and Mărginean, N. and Mărginean, R. and Marroquin, I. and Mihai, C. and Mihai, R. E. and Nácher, E. and Nae, S. and Negret, A. and Niţă, C. and Page, R. D. and Pascu, S. and Patel, Z. and Perea, A. and Pucknell, V. and Rahkila, P. and Rapisarda, E. and Regan, P. H. and Rotaru, F. and Shand, C. M. and Simpson, E. C. and Sotty, Ch. and Stegemann, S. and Stora, T. and Tengblad, O. and Turturica, A. and Van Duppen, P. and Vedia, V. and Wadsworth, R. and Walker, P. M. and Warr, N. and Wearing, F. and De Witte, H.},
month = jun,
year = {2019},
note = {No CMAM},
pages = {271--275},
file = {ScienceDirect Full Text PDF:E:\Usuarios\Administrator\Zotero\storage\WAGGXCMW\Berry et al. - 2019 - Investigation of the Δn = 0 selection rule in Gamo.pdf:application/pdf;ScienceDirect Snapshot:E:\Usuarios\Administrator\Zotero\storage\6VFCIWXD\S0370269319302722.html:text/html},
}