Large Impact of the Decay of Niobium Isomers on the Reactor (v)over-bar(e) Summation Calculations

Guadilla, V; Algora, A.; Tain, J.; Estienne, M.; Fallot, M.; Sonzogni, A.; Agramunt, J.; Aysto, J.; Briz, J.; Cucoanes, A.; Eronen, T.; Fraile, L.; Ganioglu, Ela; Gelletly, W.; Gorelov, D.; Hakala, J.; Jokinen, A.; Jordan, D.; Kankainen, A.; Kolhinen, V; Koponen, J.; Lebois, M.; Le Meur, L.; Martinez, T.; Monserrate, M.; Montaner-Piza, A.; Moore, I; Nacher, E.; Orrigo, S.; Penttila, H.; Pohjalainen, I; Porta, A.; Reinikainen, J.; Reponen, M.; Rinta-Antila, S.; Rubio, B.; Rytkonen, K.; Shiba, T.; Sonnenschein, V; Valencia, E.; Vedia, V.; Voss, A.; Wilson, J.; Zakari-Issoufou, A-A

doi:10.1103/physrevlett.122.042502

Large Impact of the Decay of Niobium Isomers on the Reactor (v)over-bar(e) Summation Calculations

Atıf İçin Kopyala

Guadilla V., Algora A., Tain J. L., Estienne M., Fallot M., Sonzogni A. A., ...Daha Fazla

PHYSICAL REVIEW LETTERS, cilt.122, sa.4, 2019 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 122 Sayı: 4
Basım Tarihi: 2019
Doi Numarası: 10.1103/physrevlett.122.042502
Dergi Adı: PHYSICAL REVIEW LETTERS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
İstanbul Üniversitesi Adresli: Evet

Özet

Even mass neutron-rich niobium isotopes are among the principal contributors to the reactor antineutrino energy spectrum. They are also among the most challenging to measure due to the refractory nature of niobium, and because they exhibit isomeric states lying very close in energy. The beta-intensity distributions of Nb-100gs,Nb-100m and Nb-102gs,Nb-02m beta decays have been determined using the total absorption.-ray spectroscopy technique. The measurements were performed at the upgraded Ion Guide Isotope Separator On-Line facility at the University of Jyvaskyla. Here, the double Penning trap system JYFLTRAP was employed to disentangle the beta decay of the isomeric states. The new data obtained in this challenging measurement have a large impact in antineutrino summation calculations. For the first time the discrepancy between the summation model and the reactor antineutrino measurements in the region of the shape distortion has been reduced.