Bromine-87

Properties and data of the isotope ⁸⁷Br.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

Literature

See also: List of individual Bromine isotopes (and general data sources).

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:52Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.4857142857143 (= neutron-proton ratio)Neutron excess (N-Z):17Isotopic 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:S_N = 6.331(4) MeV (first neutron)
S_P = 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 T_½ = 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.

Z	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