Isotopes

Natural Abundance

Half-Life

Decay Mode

¹⁸⁴Tl

11 sec.

α, β+, ec

^185mTl

1.8 sec.

α+, i.t.

^186mTl

4 sec.

i.t.

¹⁸⁶Tl

28 sec.

β+, ec

^187mTl

16 sec.

i.t.

¹⁸⁷Tl

45 sec.

β+, ec

^188mTl

71 sec.

β+, ec

¹⁸⁸Tl

70 sec.

β+, ec

^189mTl

1.4 min.

β+, ec

¹⁸⁹Tl

2.3 min.

β+, ec

^190mTl

3.7 min.

β+, ec

¹⁹⁰Tl

2.6 min.

β+, ec

^191mTl

5.2 min.

β+, ec

^192mTl

10.8 min.

β+, ec

¹⁹²Tl

9.4 min.

β+, ec

^193mTl

2.1 min.

i.t.

¹⁹³Tl

22 min.

β+, ec

^194mTl

32.8 min.

β+, ec

¹⁹⁴Tl

33 min.

β+, ec

^195mTl

3.6 sec.

i.t.

¹⁹⁵Tl

1.13 hr.

β+, ec

^196mTl

1.4 hr.

β+, ec

¹⁹⁶Tl

1.8 hr.

β+, ec

^197mTl

540ms.

β+, ec, i.t.

¹⁹⁷Tl

2.83 hr.

β+, ec

^198mTl

1.87 hr.

β+, ec, i.t.

¹⁹⁸Tl

5.3 hr.

β+, ec

¹⁹⁹Tl

7.4 hr.

ec

²⁰⁰Tl

1.1 day

ec

²⁰¹Tl

3 days

ec

²⁰²Tl

12.23 days

ec

²⁰³Tl

29.52%

²⁰⁴Tl

3.78 yrs.

β-, ec

²⁰⁵Tl

70.48%

^206mTl

3.76 min.

i.t.

²⁰⁶Tl

4.2 min.

β-

^207mTl

1.33 sec.

i.t.

²⁰⁷Tl

4.77 min.

β-

²⁰⁸Tl

3.05 min.

β-

²⁰⁹Tl

2.2 min.

β-

²¹⁰Tl

1.3 min.

β-