201Tl

Thallium-201

Radioactive· Half-life: 3.04 d

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

81

Neutrons (N)

120

Mass Number (A)

201

Atomic Mass

200.970820AMU

Spin / Parity

1/2+

Binding E/A

7.685keV

Natural Abundance

Trace / None

Half-life

3.04 d

Decay Modesoverview · half-life · α · β⁻ · β⁺

EC
100.0%

Decay Chain

2-step decay chain → stable · Primary path shown

Medical Applications

DiagnosticTl-201

Cardiac stress testing and perfusion imaging

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