Cosmogenic and primordial radioisotopes in copper bricks shortly exposed to cosmic rays

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Coarasa, I.^1 ; Amaré, J.^1,2 ; Cebrián, S.^1,2 ; Cuestá, C.^1,2,3 ; García, E.^1,2 ; Martínez, M.^1,2,4 ; Oliván, M.A.^1,2 ; Ortigoza, Y.^1,2 ; De Solórzano, A Ortíz^1,2 ; Puimedón, J.^1,2 ; Sarsa, M.L.^1,2 ; Villar, J.A.^1,2 ; Villar, P.^1,2

Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, Pedro Cerbuna 12, Zaragoza

50009, Spain^1

Laboratorio Subterráneo de Canfranc, Paseo de los Ayerbe s/n, Canfranc Estación, Huesca

22880, Spain^2

Center for Experimental Nuclear Physics and Astrophysics, Department of Physics, University of Washington, Seattle

WA, United States^3

Dipartimento di Fisica, Sapienza Università di Roma, Roma, Italy^4

关键词: Common source;    Cosmogenic;    Exposed to;    Half lives;    HPGe detectors;    Lead shielding;    Saturation activity;    Underground laboratory;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/4/042049/pdf
DOI  :  10.1088/1742-6596/718/4/042049

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Cosmogenic activation is the most common source of radioactivity in copper, being60Co the most significant because of its long half-life (5.27 y) and saturation activity at sea level of 1 mBq/kg. Copper bricks, which had been exposed to cosmic rays for 41 days after their casting, were used to replace the internal 10 cm of the lead shielding of a HPGe detector placed at the Canfranc Underground Laboratory. We describe the outcome of the new shielding and the cosmogenic and primordial radioisotopes observed.