Roentgenium
Stability and half-lives
Table:
List of roentgenium isotopes

v
t
e

Isotope

Half-life[a]

Decay
mode

Discovery
year

Discovery
reaction

Value

ref

272Rg

4.5 ms
[22]

α

1994

209Bi(64Ni,n)

274Rg

29 ms
[22]

α

2004

278Nh(—,α)

278Rg

4.2 ms
[23]

α

2006

282Nh(—,α)

279Rg

90 ms
[23]

α

2003

287Mc(—,2α)

280Rg

4.6 s
[23]

α, EC

2003

288Mc(—,2α)

281Rg

17 s
[23]

SF, α

2010

293Ts(—,3α)

282Rg

1.7 min
[23]

α

2010

294Ts(—,3α)

283Rg[b]

5.1 min
[24]

SF

1999

283Cn(e−,νe)

286Rg[b]

10.7 min
[25]

α

1998

290Fl(e−,νeα)

Based on the table titled Roentgenium, section Stability and half-lives, answer the following question with a short sentence: What are the most recently published half-life measurements of 286Rg and 283Rg, respectively? Output only the correct answer as {"answer": "YOUR ANSWER"}.

answer: The ²⁸⁶Rg has a half-life of about 10.7 minutes and the ²⁸³Rg has a half-life of about 5.1 minutes.