D. Kasperovych, A. Barabash, P. Belli, R. Bernabei, R. Boiko, F. Cappella, V. Caracciolo, R. Cerulli, F. Danevich, A. Marco, A. Incicchitti, V. Kobychev, S. Konovalov, M. Laubenstein, D. Poda, O. Polischuk, V. Tretyak, V. Umatov
{"title":"150Nd到150Sm第一个0+激发能级的双β衰变研究","authors":"D. Kasperovych, A. Barabash, P. Belli, R. Bernabei, R. Boiko, F. Cappella, V. Caracciolo, R. Cerulli, F. Danevich, A. Marco, A. Incicchitti, V. Kobychev, S. Konovalov, M. Laubenstein, D. Poda, O. Polischuk, V. Tretyak, V. Umatov","doi":"10.1063/1.5130975","DOIUrl":null,"url":null,"abstract":"Two-neutrino 2β decay of 150Nd to the 01+ 740.5-keV excited level of 150Sm has been investigated by using a highly purified 2.381-kg Nd2O3 sample with the help of ultra-low-background gamma spectrometer with 4 HPGe detectors (≈ 255 cm3 each) at the Gran Sasso underground laboratory (INFN, Italy). Gamma quanta, expected in cascade after de-excitation of the 01+ (740.5 keV) excited level of 150Sm, have been observed in the coincidence spectra accumulated over 25947 h. The half-life value has been preliminary estimated as T1/2=[ 6.9−1.9+4.0(stat)±1.1(syst) ]×109y. The data taking is in progress to reduce the statistical error.Two-neutrino 2β decay of 150Nd to the 01+ 740.5-keV excited level of 150Sm has been investigated by using a highly purified 2.381-kg Nd2O3 sample with the help of ultra-low-background gamma spectrometer with 4 HPGe detectors (≈ 255 cm3 each) at the Gran Sasso underground laboratory (INFN, Italy). Gamma quanta, expected in cascade after de-excitation of the 01+ (740.5 keV) excited level of 150Sm, have been observed in the coincidence spectra accumulated over 25947 h. The half-life value has been preliminary estimated as T1/2=[ 6.9−1.9+4.0(stat)±1.1(syst) ]×109y. The data taking is in progress to reduce the statistical error.","PeriodicalId":23715,"journal":{"name":"WORKSHOP ON CALCULATION OF DOUBLE-BETA-DECAY MATRIX ELEMENTS (MEDEX’19)","volume":"33 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2019-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":"{\"title\":\"Study of double-β decay of 150Nd to the first 0+ excited level of 150Sm\",\"authors\":\"D. Kasperovych, A. Barabash, P. Belli, R. Bernabei, R. Boiko, F. Cappella, V. Caracciolo, R. Cerulli, F. Danevich, A. Marco, A. Incicchitti, V. Kobychev, S. Konovalov, M. Laubenstein, D. Poda, O. Polischuk, V. Tretyak, V. Umatov\",\"doi\":\"10.1063/1.5130975\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Two-neutrino 2β decay of 150Nd to the 01+ 740.5-keV excited level of 150Sm has been investigated by using a highly purified 2.381-kg Nd2O3 sample with the help of ultra-low-background gamma spectrometer with 4 HPGe detectors (≈ 255 cm3 each) at the Gran Sasso underground laboratory (INFN, Italy). Gamma quanta, expected in cascade after de-excitation of the 01+ (740.5 keV) excited level of 150Sm, have been observed in the coincidence spectra accumulated over 25947 h. The half-life value has been preliminary estimated as T1/2=[ 6.9−1.9+4.0(stat)±1.1(syst) ]×109y. The data taking is in progress to reduce the statistical error.Two-neutrino 2β decay of 150Nd to the 01+ 740.5-keV excited level of 150Sm has been investigated by using a highly purified 2.381-kg Nd2O3 sample with the help of ultra-low-background gamma spectrometer with 4 HPGe detectors (≈ 255 cm3 each) at the Gran Sasso underground laboratory (INFN, Italy). Gamma quanta, expected in cascade after de-excitation of the 01+ (740.5 keV) excited level of 150Sm, have been observed in the coincidence spectra accumulated over 25947 h. The half-life value has been preliminary estimated as T1/2=[ 6.9−1.9+4.0(stat)±1.1(syst) ]×109y. The data taking is in progress to reduce the statistical error.\",\"PeriodicalId\":23715,\"journal\":{\"name\":\"WORKSHOP ON CALCULATION OF DOUBLE-BETA-DECAY MATRIX ELEMENTS (MEDEX’19)\",\"volume\":\"33 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-10-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"WORKSHOP ON CALCULATION OF DOUBLE-BETA-DECAY MATRIX ELEMENTS (MEDEX’19)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1063/1.5130975\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"WORKSHOP ON CALCULATION OF DOUBLE-BETA-DECAY MATRIX ELEMENTS (MEDEX’19)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1063/1.5130975","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
摘要
在意大利格兰萨索地下实验室(INFN)，利用配备4个HPGe探测器(每个≈255 cm3)的超低背景伽马能谱仪，利用高纯度的2.381 kg Nd2O3样品，研究了150Nd的双中微子2β衰变到150Sm的01+ 740.5 kev激发能级。伽马量子在150Sm的01+ (740.5 keV)激发能级去激发后出现级联，在累积超过25947 h的重合光谱中被观测到。半衰期初步估计为T1/2=[6.9−1.9+4.0(stat)±1.1(syst)]×109y。数据采集正在进行中，以减少统计误差。在意大利格兰萨索地下实验室(INFN)，利用配备4个HPGe探测器(每个≈255 cm3)的超低背景伽马能谱仪，利用高纯度的2.381 kg Nd2O3样品，研究了150Nd的双中微子2β衰变到150Sm的01+ 740.5 kev激发能级。伽马量子在150Sm的01+ (740.5 keV)激发能级去激发后出现级联，在累积超过25947 h的重合光谱中被观测到。半衰期初步估计为T1/2=[6.9−1.9+4.0(stat)±1.1(syst)]×109y。数据采集正在进行中，以减少统计误差。
Study of double-β decay of 150Nd to the first 0+ excited level of 150Sm
Two-neutrino 2β decay of 150Nd to the 01+ 740.5-keV excited level of 150Sm has been investigated by using a highly purified 2.381-kg Nd2O3 sample with the help of ultra-low-background gamma spectrometer with 4 HPGe detectors (≈ 255 cm3 each) at the Gran Sasso underground laboratory (INFN, Italy). Gamma quanta, expected in cascade after de-excitation of the 01+ (740.5 keV) excited level of 150Sm, have been observed in the coincidence spectra accumulated over 25947 h. The half-life value has been preliminary estimated as T1/2=[ 6.9−1.9+4.0(stat)±1.1(syst) ]×109y. The data taking is in progress to reduce the statistical error.Two-neutrino 2β decay of 150Nd to the 01+ 740.5-keV excited level of 150Sm has been investigated by using a highly purified 2.381-kg Nd2O3 sample with the help of ultra-low-background gamma spectrometer with 4 HPGe detectors (≈ 255 cm3 each) at the Gran Sasso underground laboratory (INFN, Italy). Gamma quanta, expected in cascade after de-excitation of the 01+ (740.5 keV) excited level of 150Sm, have been observed in the coincidence spectra accumulated over 25947 h. The half-life value has been preliminary estimated as T1/2=[ 6.9−1.9+4.0(stat)±1.1(syst) ]×109y. The data taking is in progress to reduce the statistical error.
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