Prof.
Vincenzo Caracciolo
(Physics Department, University of Roma Tor Vergata and INFN, I-00133 Rome, Italy)
The first-forbidden non-unique $\beta$ decay of $^{113\text{m}}$Cd was studied at LNGS using a $^{106}$CdWO$_4$ crystal scintillator enriched in $^{106}$Cd and contaminated with $^{113m}$Cd at a level of $\sim$ (14–28) Bq. The half-life T$_{1/2}$ of $^{113\text{m}}$Cd was determined through low-background $\beta$ spectral analysis of data collected in 2009, 2015, and 2023, resulting in T$_{1/2} =$ 13.58(32) years. For the first time, the $\beta$ spectral shape of $^{113\text{m}}$Cd was studied experimentally and compared with theoretical shell model calculations, including atomic shell effects. In addition, ultra-low-background $\gamma$ spectrometry with HPGe detectors allowed us to refine the isomeric decay branching ratio and the $\gamma$-ray energy of the transition to the ground state of $^{113}$Cd to 0.0792(21)\% and 263.36(4) keV, respectively. Finally, a lower limit on the $\beta$ decay of $^{113m}$Cd to the 391.699 keV metastable state of $^{113}$In was established for the first time: T$_{1/2} \geq 8.6 \times 10^6$ years at 90\% C.L.
Details
Vincenzo Caracciolo, Professor, Tor Vergata University of Rome, Italy, https://web.uniroma2.it/
| Internet talk |
Yes
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| Is this an abstract from experimental collaboration? |
Yes
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| Name of experiment and experimental site |
DAMA, https://dama.web.roma2.infn.it/
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| Is the speaker for that presentation defined? |
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Prof.
Vincenzo Caracciolo
(Physics Department, University of Roma Tor Vergata and INFN, I-00133 Rome, Italy)
Alice Leoncini
(Università degli Studi di Roma Tor Vergata and INFN)
Antonella Incicchitti
(Istituto Nazionale di Fisica Nucleare sezione di Roma Tor Vergata)
D.V. Kasperovych
(Institute for Nuclear Research of NASU, 03028 Kyiv, Ukraine)
D.V. Poda
(Universit`e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France)
Fabio Cappella
(Istituto Nazionale di Fisica Nucleare sezione di Roma Tor Vergata)
Fedor Danevich
(Institute for Nuclear Research of NASU, 03028 Kyiv, Ukraine INFN, Laboratori)
Francesco Ferella
(Istituto Nazionale di Fisica Nucleare sezione di Roma Tor Vergata)
J. Suhonen
(Department of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014, Jy- vaskyla, Finland and International Centre for Advanced Training and Research in Physics (CIFRA),P.O. Box MG12, 077125 Bucharest-Magurele, Romania)
M. Laubenstein
(Istituto Nazionale di Fisica Nucleare sezione di Roma Tor Vergata)
M. Ramalho
(Department of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014, Jy- vaskyla, Finland)
Oksana G. Polischuk
(Institute for Nuclear Research of NASU, 03028 Kyiv, Ukraine)
Pierluigi Belli
(Istituto Nazionale di Fisica Nucleare sezione di Roma Tor Vergata)
Riccardo Cerulli
(Istituto Nazionale di Fisica Nucleare sezione di Roma Tor Vergata)
Rita Bernabei
(Istituto Nazionale di Fisica Nucleare sezione di Roma Tor Vergata)
Stefano Nisi
(Istituto Nazionale di Fisica Nucleare sezione di Roma Tor Vergata)
V.R. Klavdiienko
(Institute for Nuclear Research of NASU, 03028 Kyiv, Ukraine)
V.V. Kobychev
(Institute for Nuclear Research of NASU, 03028 Kyiv, Ukraine)
Vladimir I. Tretyak
(Institute for Nuclear Research of NASU, 03028 Kyiv, Ukraine)
