Strontium-107

Properties and data of the isotope ¹⁰⁷Sr.

Contents

General data

Name of the isotope:Strontium-107; Sr-107Symbol:¹⁰⁷Sr or 10738SrMass number A:107 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:69Isotopic mass:106.96897(75) u (atomic weight of Strontium-107)Nuclide mass:106.9481248 u (calculated nuclear mass without electrons)Mass excess:-28.90426 MeVMass defect:0.92626042000001 u (per nucleus)Nuclear binding energy:862.80602367 MeV (per nucleus)
8.0636077 MeV (average binding energy per nucleon)Separation energy:S_N = 2.18(92) MeV (first neutron)Half-life:395 nsDecay constant λ:1754802.9887594 s^-1Specific activity α:9.969500735610 × 10⁺²⁷ Bq g^-1
2.69445965827 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2010

Radioactive Decay

Half-life T_½ = 395 ns respectively 3.95 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy
β^-	¹⁰⁷Y	?	13.46(86) MeV
β^-, n	¹⁰⁶Y	?	9.08(86) MeV
β^-, 2n	¹⁰⁵Y	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 69) and isobaric (same nucleon number A = 107) with Strontium-107. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 69	Isobar A = 107
38	¹⁰⁷Sr	¹⁰⁷Sr
39	¹⁰⁸Y	¹⁰⁷Y
40	¹⁰⁹Zr	¹⁰⁷Zr
41	¹¹⁰Nb	¹⁰⁷Nb
42	¹¹¹Mo	¹⁰⁷Mo
43	¹¹²Tc	¹⁰⁷Tc
44	¹¹³Ru	¹⁰⁷Ru
45	¹¹⁴Rh	¹⁰⁷Rh
46	¹¹⁵Pd	¹⁰⁷Pd
47	¹¹⁶Ag	¹⁰⁷Ag
48	¹¹⁷Cd	¹⁰⁷Cd
49	¹¹⁸In	¹⁰⁷In
50	¹¹⁹Sn	¹⁰⁷Sn
51	¹²⁰Sb	¹⁰⁷Sb
52	¹²¹Te	¹⁰⁷Te
53	¹²²I
54	¹²³Xe
55	¹²⁴Cs
56	¹²⁵Ba
57	¹²⁶La
58	¹²⁷Ce
59	¹²⁸Pr
60	¹²⁹Nd
61	¹³⁰Pm
62	¹³¹Sm
63	¹³²Eu