# Category decay History

See `CONTRIBUTING.rst` for details of **required** info/format for each entry,
which **must** added in reverse chronological order (newest at the top). It must **not**
be used as a substitute for writing good git commit messages!


## 2021-12-10 Ben Morgan (decay-V11-00-00)
- Change to new Markdown History format

---

# History entries prior to 11.0

- 16 April 2021 B. Morgan (decay-V10-07-00)
- Migrate build to modular CMake API

- 01 November 2019 Vladimir Ivanchenko (decay-V10-05-01)
- G4Decay.cc : Extended printout in the case of G4Exception DECAY101
    and DECAY102

- 14 December 2018 Makoto Asai (decay-V10-05-00)
- G4Decay.cc, G4UnknownDecay : Allowing absolute zero proper decay time.
  Co-working with event-V10-05-00 and particles-V10-05-00

- 12 September 2017 Krzysztof Genser (decay-V10-03-04)
- Moved Muonic Atom files to processes/hadronic/stopping
- Replaced DECAY_MuonicAtomDecay process type with DECAY_MuAtom

- Aug. 15, 2017 Hisaya Kurashige (decay-V10-03-03)
- clean up NULL and 0 pointer and use nullptr
- remove tests/test01
- add tests/tst_dcy_01

- Aug. 14, 2017 Hisaya Kurashige (decay-V10-03-02)
- Modified to suppress Compiler Warning (clang80)

- Aug. 14, 2017 Hisaya Kurashige (decay-V10-03-00)
- Add ProcessDescription

- October 18, 2016 Gabriele Cosmo (decay-V10-02-03)
- Corrected CMake and GNUMake scripts to include new dependency on
  particles/hadrons/ions submodule...

- October 17, 2016 Kevin Lynch (for Lynch and Genser) (decay-V10-02-02)
- Add G4MuonicAtomDecay for decay of muonic atoms

- June 10, 16 Gunter Folger     (decay-V10-02-01)
  - G4Decay::DecayIt(): better format and info on IsOK... in exception DECAY003

- June 10, 16 Gunter Folger     (decay-V10-02-00)
  - In G4Decay::DecayIt(): add more information in exception DECAY003

- Sep. 29, 15 Hisaya Kurashige  (decay-V10-01-04)
- fix problem #1783 of spin treatment for in-filght decay
  (co-work tags: track-V10-01-10, particles-V10-01-10)

- Aug. 14, 15 Hisaya Kurashige  (decay-V10-01-03)
- Checking of parent mass enough for decay products is moved to
  G4VDecayChannel::IsOKWithParentMass
  (i.e. No check in G4Decay::DecayIt)
-- co work with particles-V10-01-05

- June 22, 15 A.Ribon       (decay-V10-01-01)
- Add a safety margin of 1 keV when checking that the parent mass is
  enough for decay products in G4Decay::DecayIt

G4Decay::DecayIt to check
  that the parent mass is enough for decay products

- June 19, 15 H.Kurashige   (decay-V10-01-00)
- Fix a problem of G4Decay::DecayIt to check
  that the parent mass is enough for decay products

- Feb. 22, 14 H.Kurashige   (decay-V10-00-02)
- Fix the bug of assigning DBL_MAX for stable particle life time
  (Bug #1569)

- Feb. 21, 14 J.Apostolakis (decay-V10-00-01) corrected bug # below.

- Jan. 04, 14 H.Kurashige   (decay-V10-00-00)
- Fix the bug of wrong global time for secondaries
  in case that the primary track stops during along step
  (Bug #1555)

- Jun. 11, 13 M.Asai (decay-V09-06-01)
- Remove the modification in the previous tag, as it is no longer needed as all ions
  are generated after GenericIon gets the collect process manager.

- Jun. 9, 13 M.Asai (decay-V09-06-00)
- Modify G4Decay::IsApplicable() to make it return false for all ions in the IonTable.

- Jul. 5, 12 G.Cosmo (decay-V09-05-00)
- Explicitly use inclusion of headers for system of units and physical
  constants, in plan to remove implicit inclusion from globals.hh.

- Oct. 17, 11 H.Kurashige (decay-V09-04-02)
- Fix obsolete G4Exception

- Jul. 6, 11 H.Kurashige (decay-V09-04-01)
- Modify G4Decay  to propose the final local time rather than the global time
  so that local time can be updated properly
  (see problem #1224)

- Jun. 4, 11 H.Kurashige (decay-V09-04-00)
- Add SubType of DECAY_Radioactive (=210)

- Oct. 30, 10 H.Kurashige (decay-V09-03-01)
- Fix minor bugs reported by Coverity

- Aug. 10, 10 H.Kurashige (decay-V09-03-00)
- Use const pointer to G4ParticleDefinition because it should not be modified.

- Sep. 19, 08 H.Kurashige (decay-V09-01-04)
- modify process sub type enumeration

- Aug. 22, 08 P.Gumplinger (decay-V09-01-03)
- fix a bug in G4DecayWithSpin.cc: there is a memory overwrite when the
  GetFieldValue being called initializes a fieldValue array of size 6
  when the array is only defined of size 3 in the calling program.
  Thanks to Kamil Sedlak (PSI) for pointing this out and suggesting this fix.

- Apr. 16, 08 H.Kurashige  (decay-V09-01-02)
- fix a bug when shortlived particles has finite  pre-assigned proper time

- Apr. 11, 08 P.Gumplinger (decay-V09-01-01)
- modify G4DecayWithSpin::DecayIt to allow spin precession also for EM Fields;
  e.g. fields that do "DoesFieldChangeEnergy()" but only if the B-field
  component is > 0. (thanks to Kamil Sedlak, Toni Shiroka from PSI)

- Dec. 15, 07 H.Kurashige (decay-V09-01-00)
- add G4DecayProcessType
- define process sub type

- Oct. 29, 07 P.Gumplinger (decay-V09-00-02)
- add G4PionDecayMakeSpin class
  set the daughter muon spin for 2 body decays of
  pi, K and K0_long

- Oct. 12, 07 H.Kurashige (decay-V09-00-01)
- add forward declaration for G4VExtDecayer in G4DecayWithSpin

- Oct. 06, 07 H.Kurashige (decay-V09-00-00)
- Add a method of DaughterPolarization in G4Decay

- May. 07, 07 H.Kurashige (decay-V08-02-00)
- Add protection for "TotalEnergy < Mass"

- Apr. 29, 05 H.Kurashige (decay-V07-00-00)
- Fixed bug in GPILAtRest.

- Dec. 10, 04 G.Cosmo (decay-V06-02-05)
- replaced M_PI with CLHEP's pi.

- Dec. 2, 04 H.Kurashige (decay-V06-02-04)
- migration to cmath

- Oct. 19, 04 H.Kurashige (decay-V06-02-03)
- Modify G4UnknownDecay for migration of ParticleChange

- Sep. 17, 04 P. Gumplinger (decay-V06-02-02)
- Add G4DecayWithSpin class and allow for dependency to
  /geometry/navigation in GNUmakefile
- Fixed the problem of determination of particle's decay time
  for the case the particle stops due to energy loss.

- Aug. 10, 04 H.Kurashige(decay-V06-02-01)
- Add G4Decay::GetRemainderLifeTime method

- Jul. 07, 04 M.Asai (decay-V06-02-00)
- Introducing G4UnknownDecay

- May. 08, 04 H.Kurashige(decay-V06-01-00)
- Change method name for ParticleChange

- Mar. 12, 04 H.Kurashige(decay-V06-00-00)
- Fixed bug in PostStepGPIL in case of stopping during AlongStep actions

- Apr. 26, 03 V.Ivanchenko(decay-V05-00-00)
- add initialisation of TouchableHandle for decay products

- Feb. 12, 02 H.Kurashige(decay-V04-00-01)
- Remove physics table

- Feb. 9, 02 H.Kurashige(decay-V04-00-00)
- Modify Lowest/HighestBinEnergy for physics table
  to calculate beta for slow particle

- Aug. 22, 01 H.Kurashige(decay-V03-02-01)
- Clean up codes

- Feb. 29, 01 H.Kurashige(decay-V03-00-03)
- Fix minor bug in G4VExtDecayer

- Feb. 22, 01 H.Kurashige(decay-V03-00-02)
- Add G4VExtDecayer and modify G4Decay

- Jan. 18, 01 H.Kurashige(decay-V03-00-01)
- Use PreAssignedDecayTime in G4DynamicParticle if necessary

- Oct. 24, 00 H.Kurashige(decay-V02-00-01)
- Bug fix in G4Decay::DecayIt (no decay if the particle is stable)

- Oct. 19, 00 H.Kurashige(decay-V02-00-00)
- Bug fix in G4Decay to avoid direct modification of G4Track
  by the Decay Process

- Mar. 1, 00 H.Kurashige (decay-V01-00-00)
- Bug fix in G4Decay::IsApplicable()
  G4Decay should be applicable to "shortlived" particles
