Kalsium-48

Kalsium-48, 48Ca
Umum
Simbol48Ca
Namakalsium-48, Ca-48
Proton (Z)20
Neutron (N)28
Data nuklida
Kelimpahan alam0.187%
Waktu paruh (t1/2)(6.4+0.7−0.6+1.2−0.9) × 1019 a
Massa isotop47.952534(4) u
Isotop kalsium
Tabel nuklida lengkap

Kalsium-48 adalah isotop kalsium dengan 20 proton dan 28 neutron (sehingga nomor massanya adalah 48). Isotop ini memiliki fraksi mol 0,187% dari kalsium di alam.[1] Rasio neutron yang tinggi ini tidak umum pada atom-atom ringan, tetapi kalsium-48 memiliki hambatan besar terhadap peluruhan beta sehingga jenis peluruhan yang pernah diamati hanyalah proses peluruhan beta ganda yang sangat langka. Isotop ini memiliki waktu paruh yang sangat besar yaitu 6.4×1019 tahun, sehingga hampir mendekati isotop stabil.[2]

Referensi

  1. ^ Coursey, J. S.; D. J. Schwab; R. A. Dragoset (February 2005). "Atomic Weights and Isotopic Compositions". NIST Physical Reference Data. Diakses tanggal 2006-10-27.
  2. ^ Arnold, R.; et al. (NEMO-3 Collaboration) (2016). "Measurement of the double-beta decay half-life and search for the neutrinoless double-beta decay of 48Ca with the NEMO-3 detector". Physical Review D. 93 (11): 112008. arXiv:1604.01710. Bibcode:2016PhRvD..93k2008A. doi:10.1103/PhysRevD.93.112008.

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