New Results of the Experiment to Search for Double Beta Decay of ¹⁰⁶Cd with Enriched ¹⁰⁶CdWO₄ Scintillator

• Published in: Universe
• Main Authors: P. Belli, R. Bernabei, F. Cappella, V. Caracciolo, R. Cerulli, F. A. Danevich, A. Incicchitti, D. V. Kasperovych, V. R. Klavdiienko, V. V. Kobychev, A. Leoncini, V. Merlo, O. G. Polischuk, V. I. Tretyak
• Format: Article
• Language: English
• Published: MDPI AG 2025-04-01
• Subjects: double beta decay; ¹⁰⁶Cd; ¹⁰⁶CdWO₄; crystal scintillator; low background measurements
• Online Access: https://www.mdpi.com/2218-1997/11/4/123
• ISSN: 2218-1997

In this article, we present current results of the experiment searching for double beta decay of ¹⁰⁶Cd with the help of an enriched ¹⁰⁶CdWO₄ crystal scintillator in coincidence with two CdWO₄ scintillation detectors. The experiment is carried out at the Gran Sasso underground laboratory of the National Institute for Nuclear Physics (LNGS INFN, Italy). After 1075 days of data-taking, no double-beta effects were observed. New half-life limits have been set for the different modes and channels of double beta processes in ¹⁰⁶Cd at the level of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo movablelimits="true" form="prefix">lim</mo><msub><mi>T</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msub><mo>=</mo><msup><mn>10</mn><mn>20</mn></msup><mo>−</mo><msup><mn>10</mn><mn>22</mn></msup></mrow></semantics></math></inline-formula> years.