Nuclear physics for geo-neutrino studies

被引：12

作者：

Fiorentini, Gianni ^{[1
,2
]}

Ianni, Aldo ^{[3
]}

Korga, George ^{[3
]}

Lissia, Marcello ^{[4
]}

Mantovani, Fabio ^{[1
,2
,5
]}

Miramonti, Lino ^{[6
,7
]}

Oberauer, Lothar ^{[8
]}

Obolensky, Michel ^{[9
]}

Smirnov, Oleg ^{[10
]}

Suvorov, Yury ^{[3
]}

机构：

[1] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy

[2] Ist Nazl Fis Nucl, Sez Ferrara, Ferrara, Italy

[3] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Assergi, Italy

[4] Ist Nazl Fis Nucl, Sez Cagliari, I-09042 Monserrato, Italy

[5] Ctr GeoTecnol, I-52027 San Giovanni Valdarno, Italy

[6] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[7] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[8] Tech Univ Munich, Dept Phys, D-85747 Garching, Germany

[9] Lab AstroParticule & Cosmol, F-75231 Paris 13, France

[10] Joint Inst Nucl Res, RU-141980 Dubna, Russia

来源：

PHYSICAL REVIEW C | 2010年 / 81卷 / 03期

关键词：

BOREXINO; DETECTOR;

D O I：

10.1103/PhysRevC.81.034602

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Geo-neutrino studies are based on theoretical estimates of geo-neutrino spectra. We propose a method for a direct measurement of the energy distribution of antineutrinos from decays of long-lived radioactive isotopes. We present preliminary results for the geo-neutrinos from Bi-214 decay, a process that accounts for about one-half of the total geo-neutrino signal. The feeding probability of the lowest state of Bi-214-the most important for geo-neutrino signal-is found to be p(0) = 0.177 +/- 0.004 (stat) (+0.003)(-0.001) (sys), under the hypothesis of universal neutrino spectrum shape (UNSS). This value is consistent with the (indirect) estimate of the table of isotopes. We show that achievable larger statistics and reduction of systematics should allow for the testing of possible distortions of the neutrino spectrum from that predicted using the UNSS hypothesis. Implications on the geo-neutrino signal are discussed.

引用

页数：9

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