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Strontium-101

Properties and data of the isotope 101Sr.


Contents

See also: list of Strontium isotopes.

 

General data

Name of the isotope:Strontium-101; Sr-101Symbol:101Sr or 10138SrMass number A:101 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:63Isotopic mass:100.940606(9) u (atomic weight of Strontium-101)Nuclide mass:100.9197608 u (calculated nuclear mass without electrons)Mass excess:-55.32515 MeVMass defect:0.902634924 u (per nucleus)Nuclear binding energy:840.7990159 MeV (per nucleus)
8.32474273 MeV (average binding energy per nucleon)
Separation energy:SN = 3.575(11) MeV (first neutron)
SP = 16.367(21) MeV (first proton)
Half-life:118(3) msDecay constant λ:5.8741286488131 s-1Specific activity α:3.537483015254 × 10+22 Bq g-1
956076490609.24 Ci g-1
Spin and parity:
(nuclear angular momentum)
(5/2-)Year of discovery:1983

 

Radioactive Decay

Half-life T½ = 118(3) ms respectively 1.18 × 10-1 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
β-101Y97.63 %9.736(11) MeV
β-, n100Y2.37(14) %3.931(14) MeV

 

Parent Nuclides

Direct parent isotope is: 101Rb.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 63) and isobaric (same nucleon number A = 101) with Strontium-101. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 63Isobar A = 101
3598Br
3699Kr101Kr
37100Rb101Rb
38101Sr101Sr
39102Y101Y
40103Zr101Zr
41104Nb101Nb
42105Mo101Mo
43106Tc101Tc
44107Ru101Ru
45108Rh101Rh
46109Pd101Pd
47110Ag101Ag
48111Cd101Cd
49112In101In
50113Sn101Sn
51114Sb
52115Te
53116I
54117Xe
55118Cs
56119Ba
57120La
58121Ce
59122Pr

 

External data and identifiers

Adopted Levels, Gammas:NuDat 101Sr

 


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Last update: 2020-10-14


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