About   |   More   |   Search
ChemLin Logo

Strontium-78

Properties and data of the isotope 78Sr.


Contents

See also: list of Strontium isotopes.

 

General data

Name of the isotope:Strontium-78; Sr-78Symbol:78Sr or 7838SrMass number A:78 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:40Isotopic mass:77.932180(8) u (atomic weight of Strontium-78)Nuclide mass:77.9113348 u (calculated nuclear mass without electrons)Mass excess:-63.17392 MeVMass defect:0.71176785599999 u (per nucleus)Nuclear binding energy:663.00748726 MeV (per nucleus)
8.50009599 MeV (average binding energy per nucleon)
Separation energy:SN = 13.442(11) MeV (first neutron)
SP = 5.632(8) MeV (first proton)
Half-life:160(8) sDecay constant λ:0.0043321698784997 s-1Specific activity α:3.388173667207 × 10+19 Bq g-1
915722612.75886 Ci g-1
Spin and parity:
(nuclear angular momentum)
0+Charge radius:4.2561(40) femtometer fmMirror nucleus:Zirconium-78Year of discovery:1982

 

Radioactive Decay

Half-life T½ = 160(8) s respectively 1.60 × 102 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
EC/β+78Rb100 %3.761(8) MeV

 

Parent Nuclides

Direct parent isotope is: 78Y.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 40) and isobaric (same nucleon number A = 78) with Strontium-78. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 40Isobar A = 78
2161Sc
2262Ti
2363V
2464Cr
2565Mn
2666Fe
2767Co
2868Ni78Ni
2969Cu78Cu
3070Zn78Zn
3171Ga78Ga
3272Ge78Ge
3373As78As
3474Se78Se
3575Br78Br
3676Kr78Kr
3777Rb78Rb
3878Sr78Sr
3979Y78Y
4080Zr78Zr
4181Nb
4282Mo

 

External data and identifiers

Adopted Levels, Gammas:NuDat 78Sr

 


More Chemistry

isotopes

Social Media

Facebook

LinkedIn

Twitter


Last update: 2023-10-04


© 1996 - 2025 ChemLin