Bromine-87
Properties and data of the isotope 87Br.
See also: list of Bromine isotopes.
General data
Name of the isotope:Bromine-87; Br-87Symbol:87Br or 8735BrMass number A:87 (= number of nucleons)Atomic number Z:35 (= number of protons)Neutrons N:52Isotopic mass:86.920674(3) u (atomic weight of Bromine-87)Nuclide mass:86.9014744 u (calculated nuclear mass without electrons)Mass excess:-73.89169 MeVMass defect:0.80377775199999 u (per nucleus)Nuclear binding energy:748.71415332 MeV (per nucleus)
8.60590981 MeV (average binding energy per nucleon)Separation energy:SN = 6.331(4) MeV (first neutron)
SP = 10.677(4) MeV (first proton)Half-life:55.68(12) sDecay constant λ:0.012448764018677 s-1Specific activity α:8.717233773556 × 10+19 Bq g-1
2356009127.9882 Ci g-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:1943
Radioactive Decay
Half-life T½ = 55.68(12) s respectively 5.568 × 101 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 87Kr | 97.40(4) % | 6.818(3) MeV | |
β-, n | 86Kr | 2.60(4) % | 1.303(3) MeV | |
Parent Nuclides
Direct parent isotope is: 87Se.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 52) and isobaric (same nucleon number A = 87) with Bromine-87. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 52 | Isobar A = 87 |
28 | 80Ni | |
29 | 81Cu | |
30 | 82Zn | |
31 | 83Ga | 87Ga |
32 | 84Ge | 87Ge |
33 | 85As | 87As |
34 | 86Se | 87Se |
35 | 87Br | 87Br |
36 | 88Kr | 87Kr |
37 | 89Rb | 87Rb |
38 | 90Sr | 87Sr |
39 | 91Y | 87Y |
40 | 92Zr | 87Zr |
41 | 93Nb | 87Nb |
42 | 94Mo | 87Mo |
43 | 95Tc | 87Tc |
44 | 96Ru | 87Ru |
45 | 97Rh | |
46 | 98Pd | |
47 | 99Ag | |
48 | 100Cd | |
49 | 101In | |
50 | 102Sn | |
51 | 103Sb | |
External data and identifiers
Literature and References
[1] - R. C. Greenwood, K. D. Watts:
Delayed Neutron Energy Spectra of 87Br, 88Br, 89Br, 90Br, 137I, 138I, 139I, and 136Te.
In: Nuclear Science and Engineering, Volume 126, (2017), DOI 10.13182/NSE97-A24484.
Last update: 2023-04-27
Perma link: https://www.chemlin.org/isotope/bromine-87
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