Ultra-low background measurements in a large volume underground detector

被引：150

作者：

Alimonti, G

Anghloher, G

Arpesella, C

Balata, M

Bellini, G

Benziger, J

Bonetti, S

Cadonati, L

Calaprice, FP

Cecchet, G

Chen, M

Darnton, N

de Bari, A

Deutsch, M

Elisei, E

von Feilitzsch, F

Galbiati, C

Gatti, F

Giammarchi, MG

Giugni, D

Goldbrunner, T

Golubchikov, A

Goretti, A

Hagner, T

Hartmann, FX

von Hentig, R

Heusser, G

Ianni, A

Jochum, J

Laubenstein, M

Lombardi, P

Magni, S

Malvezzi, S

Manno, I

Manuzio, G

Masetti, F

Mazzucato, U

Meroni, E

Neff, M

Nostro, A

Oberauer, L

Perotti, A

Preda, A

Raghavan, RS

Ranucci, G

Resconi, E

Ruscitti, M

Scardaoni, R

Schonert, S

Smirnov, O

机构：

[1] Univ Milan, Dept Phys, I-20133 Milan, Italy

[2] Lab Nazl Gran Sasso, Assergi, Aq, Italy

[3] MIT, Cambridge, MA 02139 USA

[4] Joint Inst Nucl Res, Dubna, Russia

[5] Tech Univ Munich, D-8046 Garching, Germany

[6] Univ Genoa, Dept Phys, Genoa, Italy

[7] Ist Nazl Fis Nucl, I-16146 Genoa, Italy

[8] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[9] Ist Nazl Fis Nucl, I-20133 Milan, Italy

[10] AT&T Bell Labs, Murray Hill, NJ 07974 USA

[11] Univ Pavia, Dept Phys, I-27100 Pavia, Italy

[12] Ist Nazl Fis Nucl, I-27100 Pavia, Italy

[13] Univ Perugia, Dept Phys, I-06100 Perugia, Italy

[14] Ist Nazl Fis Nucl, I-06100 Perugia, Italy

[15] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[16] Princeton Univ, Dept Engn, Princeton, NJ 08544 USA

来源：

ASTROPARTICLE PHYSICS | 1998年 / 8卷 / 03期

关键词：

neutrino; low radioactivity; low background experiments;

D O I：

10.1016/S0927-6505(97)00050-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A large volume (4.8 m(3)) liquid scintillator detector has been running in Hall C of the Gran Sasso Underground Laboratory since February 1995. This detector is called the "Counting Test Facility" (CTF). The main goal of the detector facility is the measurement of ultralow background levels in scintillators and the development of processes able to purify them at this level. The detector has been designed to have exceptional sensitivity using a variety of methods to identify backgrounds. With the CTF, records were achieved in the domain of low background large volume detectors. Limits of 3.5 +/- 1.3 x 10(-16) g/g and 4.41(-1.2)(+1.5) x 10(-16) g/g for the U-238 and Th-232 daughters, respectively, and 1.85 +/- 0.13 +/- 0.01 x 10(-18) for the isotopic abundance of C-14 relative to C-12 were obtained. These results are very encouraging and point towards the feasibility of low energy, real time scintillation detectors for solar neutrinos, such as Borexino. (C) 1998 Elsevier Science B.V.

引用

页码：141 / 157

页数：17

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