Nuclear data explorer · compound nucleus
3He
3He is formed when 2H + p fuse. Its levels just above each threshold are the resonances that set those reactions' rates.
Channels and what has been measured
Every EXFOR reaction that forms 3He: entrance pair (rows) and the quantities measured (columns), with the energies covered.
| Reaction | Datasets | σ | S | σ→Eₓ | dσ/dΩ | Ay | Y | MACS | other | Fitted in evaluation |
|---|---|---|---|---|---|---|---|---|---|---|
| 2H(p,γ)3He | 50 | 102.5 keV – 7.9 MeV | 102.2 keV – 1.1 MeV | 195 MeV – 130 MeV | 1710 keV – 320 MeV | 710 keV – 320 MeV | — (0) | 3 | 23.3 MeV – 130 MeV | |
| 2H(p,el) | 185 | — (0) | — (0) | — (0) | 86270 keV – 2800 MeV | 96430 keV – 1300 MeV | 2430 MeV – 600 MeV | — (0) | 189 MeV – 130 MeV | |
| 1H(d,el) | 154 | 13.5 MeV | — (0) | — (0) | 30270 keV – 370 MeV | 121210 keV – 680 MeV | — (0) | — (0) | 2160 MeV – 290 MeV | |
| 1H(d,γ)3He | 49 | 375 keV – 15 MeV | 175 keV – 170 keV | — (0) | 613 keV – 66 MeV | 3913 keV – 66 MeV | — (0) | — (0) | — (0) | |
| 2H(p,n)2He | 21 | — (0) | — (0) | — (0) | 3320 MeV – 1100 MeV | 1693 MeV – 490 MeV | — (0) | — (0) | 2310 MeV – 1100 MeV | |
| 1H(d,n)2He | 14 | — (0) | — (0) | — (0) | — (0) | 1419 MeV – 370 MeV | — (0) | — (0) | — (0) | |
| 1H(d,p)2H | 4 | — (0) | — (0) | — (0) | 16.3 MeV | 32.7 MeV – 370 MeV | — (0) | — (0) | — (0) | |
| 2H(p,3He) | 3 | 1560 MeV – 660 MeV | — (0) | — (0) | 2560 MeV – 660 MeV | — (0) | — (0) | — (0) | — (0) | |
| 2H(p,inl) | 2 | — (0) | — (0) | — (0) | — (0) | 1130 MeV | — (0) | — (0) | 1130 MeV |
17 more reactions: heavier projectiles, several outgoing particles or inclusive data
| Reaction | Datasets | σ | S | σ→Eₓ | dσ/dΩ | Ay | Y | MACS | other | Fitted in evaluation |
|---|---|---|---|---|---|---|---|---|---|---|
| 2H(p,n+p) | 109 | 12.3 MeV – 3.7 MeV | — (0) | — (0) | 92.3 MeV – 130 MeV | 67330 keV – 490 MeV | — (0) | — (0) | 326.7 MeV – 190 MeV | |
| 2H(p,x) | 82 | 66.7 MeV – 650 MeV | — (0) | — (0) | 233 MeV – 420 MeV | 45220 MeV – 490 MeV | 29.6 MeV | — (0) | 279.6 MeV – 490 MeV | |
| 1H(d,n+p) | 32 | 12.2 MeV – 2.6 MeV | — (0) | — (0) | 16.2 MeV | 126.3 MeV – 45 MeV | — (0) | — (0) | 184.1 MeV – 110 MeV | |
| 1H(d,x) | 11 | 1310 MeV | — (0) | — (0) | 76 MeV – 330 MeV | — (0) | — (0) | — (0) | 32.5 MeV – 6 MeV | |
| 2H(p,sct) | 8 | — (0) | — (0) | — (0) | 41.3 MeV – 2.7 MeV | 41.3 MeV – 2.7 MeV | — (0) | — (0) | — (0) | |
| 1H(d,pin+p) | 4 | — (0) | — (0) | — (0) | 1120 MeV | 3120 MeV | — (0) | — (0) | — (0) | |
| 2H(p,tot) | 3 | 3580 keV – 350 MeV | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | |
| 1H(d,eta) | 1 | — (0) | — (0) | — (0) | 1 | — (0) | — (0) | — (0) | — (0) | |
| 1H(d,non) | 1 | 1700 keV | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | |
| 1H(d,pin+p+p) | 1 | 1 | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | |
| 1H(d,pin+pi0+p+p) | 1 | 1 | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | |
| 1H(d,pin+pip+n+p) | 1 | 1 | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | |
| 1H(d,pin+pip+p) | 1 | 1 | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | |
| 1H(d,tot) | 1 | 1290 keV – 700 keV | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | |
| 2H(p,non) | 1 | 115 MeV – 30 MeV | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | — (0) | |
| 2H(p,pai) | 1 | — (0) | — (0) | — (0) | 165 MeV – 120 MeV | — (0) | — (0) | — (0) | — (0) | |
| 2H(p,pi+x) | 1 | — (0) | — (0) | — (0) | 1420 MeV | — (0) | — (0) | — (0) | — (0) |
Level scheme
Adopted levels of 3He from ENSDF, with the particle thresholds and the Gamow window of the selected channel drawn across them.
- level in the window with a measured ωγ
- level in the window with no ωγ in EXFOR
- Jπ in parentheses or in italics is tentative.
Resonances in the window
Levels between the 2H(p,γ)3He threshold (S = 5493.5 keV) and the top of the Gamow window at T9 = 0.0157 (50 keV above it), with the resonance strengths ωγ EXFOR holds for them.
Looking for measured strengths…
| E (keV) | E_r (keV, c.m.) | Jπ | T½ or Γ | ωγ measured |
|---|---|---|---|---|
| ENSDF lists no level in this window. | ||||
A strength is matched to a level when its resonance energy plus the threshold lies within max(3 keV, 3σ) of the level energy.
Levels of 3He (1)
| E (keV) | Jπ | T½ or Γ | γ branches |
|---|---|---|---|
| 0 | 1/2+ | – | – |