Bismuth-200m1

Properties and data of the isotope ^200m1Bi.

Contents

General data

Name of the isotope:Bismuth-200m1; Bi-200m1Symbol:^200m1Bi or 200m183BiMass number A:200 (= number of nucleons)Atomic number Z:83 (= number of protons)Neutrons N:117Isotopic mass:199.978131(24) u (atomic weight of Bismuth-200m1)
Excitation energy: +x keVNuclide mass:199.9326041 u (calculated nuclear mass without electrons)Mass excess:-20.37084 MeVMass defect:1.685141828 u (per nucleus)Nuclear binding energy:1569.69950193 MeV (per nucleus)
7.84849751 MeV (average binding energy per nucleon)Half-life:31(2) minDecay constant λ:0.00037265977449459 s^-1Specific activity α:1.127743545145 × 10⁺¹⁸ Bq g^-1
30479555.274192 Ci g^-1Spin and parity:
(nuclear angular momentum)(2+)

Radioactive Decay

Half-life T_½ = 31(2) min (minutes) respectively 1.860 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	²⁰⁰Pb	≤ 100 %

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
²⁰⁰Bi		36.4(5) min	7+
^200m2Bi	428.20(10) keV	0.40(5) s	(10-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 117) and isobaric (same nucleon number A = 200) with Bismuth-200m1. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 117	Isobar A = 200
71	¹⁸⁸Lu
72	¹⁸⁹Hf
73	¹⁹⁰Ta
74	¹⁹¹W
75	¹⁹²Re
76	¹⁹³Os	²⁰⁰Os
77	¹⁹⁴Ir	²⁰⁰Ir
78	¹⁹⁵Pt	²⁰⁰Pt
79	¹⁹⁶Au	²⁰⁰Au
80	¹⁹⁷Hg	²⁰⁰Hg
81	¹⁹⁸Tl	²⁰⁰Tl
82	¹⁹⁹Pb	²⁰⁰Pb
83	²⁰⁰Bi	²⁰⁰Bi
84	²⁰¹Po	²⁰⁰Po
85	²⁰²At	²⁰⁰At
86	²⁰³Rn	²⁰⁰Rn
87	²⁰⁴Fr	²⁰⁰Fr
88	²⁰⁵Ra
89	²⁰⁶Ac
90	²⁰⁷Th